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https://www.readbyqxmd.com/read/30098277/supramolecular-metallopolymers-from-linear-materials-to-infinite-networks
#1
Kyle C Bentz, Seth Mason Cohen
The fields of coordination polymers (CPs) and supramolecular metallopolymers (SMPs) have been extensively studied for decades. Spectacular recent advances in both fields have created new compounds that lie at the interface between these two classes of organic-inorganic hybrid materials. At this interface, materials based on molecular weaving, supramolecular clusters, and metal-organic framework-polymer hybrids have emerged. This minireview provides a perspective on the intellectual emergence and connection between different supramolecular constructs and the state of the art with respect to this new materials interface...
August 11, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/30096984/potassium-hydroxide-treatment-of-uv-curable-polysiloxane-type-polymer-for-reproducible-enhancement-of-cell-adhesion-and-survival
#2
Tibor Teplický, Andrej Vincze, Anton Mateašík, Zuzana Garaiová, Miroslav Michalka, Beata Čunderlíková
Polysiloxanes have shown exquisite properties for fabrication of microstructures for various biomedical and biotechnological applications. Nevertheless, their biocompatibility in terms of cell adhesion and survival ability is controversial. A simple polysiloxane modifying procedure that reproducibly enhances cell adhesion was proposed. Sonication of the hybrid organic-inorganic polymer of polysiloxane type, Ormocomp, in potassium hydroxide (KOH)/ethanol solution enhanced adhesion and subsequent survival of a panel of four cell lines...
August 10, 2018: Biointerphases
https://www.readbyqxmd.com/read/30096754/emergence-of-nanoplatelet-light-emitting-diodes
#3
REVIEW
Peng Xiao, Junhua Huang, Dong Yan, Dongxiang Luo, Jian Yuan, Baiquan Liu, Dong Liang
Since 2014, nanoplatelet light-emitting diodes (NPL-LEDs) have been emerged as a new kind of LEDs. At first, NPL-LEDs are mainly realized by CdSe based NPLs. Since 2016, hybrid organic-inorganic perovskite NPLs are found to be effective to develop NPL-LEDs. In 2017, all-inorganic perovskite NPLs are also demonstrated for NPL-LEDs. Therefore, the development of NPL-LEDs is flourishing. In this review, the fundamental concepts of NPL-LEDs are first introduced, then the main approaches to realize NPL-LEDs are summarized and the recent progress of representative NPL-LEDs is highlighted, finally the challenges and opportunities for NPL-LEDs are presented...
August 8, 2018: Materials
https://www.readbyqxmd.com/read/30093654/functional-nano-coating-materials-by-michael-addition-and-ring-opening-polymerization-reactivity-molecular-architecture-and-refractive-index
#4
Kishore K Jena, Saeed M Alhassan, Atul Tiwari, L H Hihara
Understanding the molecular interaction and morphology of organic-inorganic hybrid materials is an important and fundamental assignment to develop novel high-performance materials. In this work, we developed two types of hybrid coating materials by using different silane coupling agents via Michael addition reaction and ring-opening polymerization. The changes in molecular interaction and morphology of the hybrid coatings due to chemical composition and curing temperature were studied by electron microscopy, spectroscopy and solid state 29 Si nuclear magnetic resonance analysis...
August 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/30091762/a-physiochemical-processing-kinetics-model-for-the-vapor-phase-infiltration-of-polymers-measuring-the-energetics-of-precursor-polymer-sorption-diffusion-and-reaction
#5
Collen Z Leng, Mark D Losego
Vapor phase infiltration (VPI) is a new approach for transforming polymers into organic-inorganic hybrid materials with unique properties. Here, we combine experimental measurements with phenomenological theory to develop a universal strategy for measuring, modeling, and predicting the processing kinetics of VPI. We apply our approach to the well-studied VPI system of trimethylaluminum (TMA) infiltrating poly(methyl methacrylate) (PMMA) because the system undergoes both precursor-polymer diffusion and reaction...
August 9, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/30089200/room-temperature-coherently-coupled-exciton-polaritons-in-two-dimensional-organic-inorganic-perovskite
#6
Jun Wang, Rui Su, Jun Xing, Di Bao, Carole Diederichs, Sheng Liu, Timothy C H Liew, Zhanghai Chen, Qihua Xiong
Two-dimensional (2D) organic-inorganic perovskite semiconductors with natural multi-quantum well structures and confined 2D excitons are intriguing for the study of strong exciton-photon coupling, due to their large exciton binding energy and oscillation strength. This strong coupling leads to a formation of the half-light half-matter bosonic quasiparticle called exciton-polariton, consisting of a linear superposition state between photonic and excitonic states. Here, we demonstrate room temperature strong coupling in exfoliated wavelength-tunable 2D organic-inorganic perovskite semiconductors embedded into a planar microcavity, exhibiting large energetic splitting-to-linewidth ratios (>34...
August 8, 2018: ACS Nano
https://www.readbyqxmd.com/read/30088766/the-largest-supertetrahedral-oxychalcogenide-nanocluster-and-its-unique-assembly
#7
Huajun Yang, Jiaxu Zhang, Min Luo, Wei Wang, Haiping Lin, Youyong Li, Dongsheng Li, Pingyun Feng, Tao Wu
Supertetrahedral oxychalcogenide Tn nanoclusters (NCs, n denotes the number of metal-chalcogen layers) integrate chemically distinct but ordered oxygen and chalcogen sites in zinc-blend-type "quantum dots". They therefore offer a new level of control over various properties of semiconducting materials. So far, few such structures are known, and the cluster size is also limited to only T4 with 20 metal sites. Herein, we report an unusual oxysulfide T5 nanocluster with 35 metal sites. It has unprecedented In-O@In-S "core-shell" nanostructure and is also the largest supertetrahedral oxychalcogenide NC...
August 8, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/30088297/recombination-dynamics-study-on-nanostructured-perovskite-light-emitting-devices
#8
Ziming Chen, Zhenchao Li, Chongyang Zhang, Xiao-Fang Jiang, Dongcheng Chen, Qifan Xue, Meiyue Liu, Shijian Su, Hin-Lap Yip, Yong Cao
The field of organic-inorganic hybrid perovskite light-emitting diodes (PeLEDs) has developed rapidly in recent years. Although the performance of PeLEDs continues to improve through film quality control and device optimization, little research has been dedicated to understanding the recombination dynamics in perovskite thin films. Likewise, little has been done to investigate the effects of recombination dynamics on the overall light-emitting behavior of PeLEDs. Therefore, this study investigates the recombination dynamics of CH3 NH3 PbI3 thin films with differing crystal sizes by measurement of fluence-dependent transient absorption dynamics and time-resolved photoluminescence...
August 7, 2018: Advanced Materials
https://www.readbyqxmd.com/read/30086954/preparation-and-analytical-application-of-novel-thiol-functionalized-solid-extraction-matrices-from-mesoporous-silica-to-hybrid-monolithic-capillary-column
#9
Ling-Yu Zhao, Qing-Yun Zhu, Xiao-Qin Zhang, Yi-Jun Chen, Li Mao, Hong-Zhen Lian, Xin Hu
A comprehensively comparative study of thiol-functionalized mesoporous silica and organic-inorganic hybrid monolithic column was reported, aiming at the separation and enrichment of inorganic arsenic. Thiol-functionalized mesoporous silica was synthesized based on the one-step co-condensation method. At the same time, a novel thiol-functionalized organic-inorganic hybrid monolithic column was synthesized using an unconventional ternary weak basic solvent system via one-step sol-gel process. The approach to prepare monolithic column through mild condition remarkably improved delamination phenomenon of thiol-functionalized hybrid monolithic column easily caused by conventional methods...
November 1, 2018: Talanta
https://www.readbyqxmd.com/read/30084391/time-resolved-surface-photovoltage-measurements-using-a-big-data-capture-approach-to-kpfm
#10
Liam Collins, Mahshid Ahmadi, Jiajun Qin, Yongtao Liu, Olga Ovchinnikova, Bin Hu, Stephen Jesse, Sergei V Kalinin
Optoelectronic behavior in materials such as organic/inorganic hybrid perovskites depend on a complex interplay between fast (electronic) and slower (ionic) processes. These processes are thought to be influenced by structural inhomogeneities (e.g. interfaces and grain boundaries) bringing forward the necessity for development of techniques capable of correlating nanostructure and photo-transport behavior. While Kelvin probe force microscopy (KPFM) is ideally suited to map surface potentials on relevant length scales, it lacks sufficient temporal resolution to extract the meaningful system dynamics...
August 7, 2018: Nanotechnology
https://www.readbyqxmd.com/read/30084256/crystal-phases-and-thermal-stability-of-co-evaporated-cspbx-3-x-i-br-thin-films
#11
Thomas Burwig, Wolfgang Fränzel, Paul Pistor
In this work we present the growth, phase transitions and thermal decomposition of CsPbX3 (X = I; Br) thin films monitored by in situ X-ray diffraction. The perovskite films are prepared in vacuum via co-evaporation of PbX2 and CsX (X = I; Br) onto glass substrates. In-situ X-ray diffraction allows the observation of initial thin film growth and phase transitions and decompositions when the samples are heated with a linear temperature ramp. Our experiments reveal the decomposition route for the CsPbX3 perovskites in high vacuum, with a much higher stability than their hybrid organic-inorganic MAPbX3 counterparts...
August 7, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/30081628/cs2pbi2cl2-all-inorganic-two-dimensional-ruddlesden-popper-mixed-halide-perovskite-with-optoelectronic-response
#12
Jiangwei Li, Qin Yu, Yihui He, Constantinos C Stoumpos, Guangda Niu, Giancarlo Trimarchi, Hang Guo, Guifang Dong, Dong Wang, Liduo Wang, Mercouri G Kanatzidis
The two-dimensional Ruddlesden-Popper (RP) phases are an important class of halide perovskites with versatile optoelec-tronic properties. So far, only organic-inorganic hybrid RP phases involving long organic spacers were reported in this class. Here, we report an all-inorganic RP phase lead halide perovskite, Cs2PbI2Cl2 (1, I4/mmm space group; a = 5.6385(8) Å, c = 18.879(4) Å), synthesized by a solid state method. The compound exhibits a band gap of Eg~3.04 eV and photocon-ductivity. We find an anomalous band gap evolution in Cs2Pb1-xSnxI2Cl2 solid solutions...
August 7, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/30081589/micro-mesoporous-fe%C3%A2-o%C3%A2-fe-phthalocyanine-microspheres-and-effects-of-their-surface-morphology-on-the-crystallization-and-properties-of-poly-arylene-ether-nitrile-composites
#13
Kui Li, Dengxun Ren, Xianzhong Tang, Mingzhen Xu, Xiaobo Liu
The surface morphology of nanoparticles significantly affects the final properties and interfacial characteristics of their composites. Thus, investigations on the surface morphology of the nanoparticles is essential to fabricate improved nanoparticle-reinforced composites. Fe₃O₄/Fe-phthalocyanine (FePc) hybrid microspheres with micro/mesoporous structures were prepared via a solvothermal process and solvent etching method. The surface morphology and compositional distribution were respectively investigated using a scanning electron microscope (SEM) and a transmission electron microscope (TEM) to rule out that FePc monomers have been blended with Fe₃O₄ to form Fe₃O₄/FePc hybrid microspheres without serious agglomeration...
August 5, 2018: Materials
https://www.readbyqxmd.com/read/30079916/novel-luminescent-lanthanide-iii-hybrid-materials-fluorescence-sensing-of-fluoride-ions-and-n-n-dimethylformamide
#14
Xuelei Pang, Li Li, Yi Wei, Xudong Yu, Yajuan Li
Two novel luminescent organic-inorganic hybrid materials, Ln(L-SBA15)3phen (Ln = Eu, Tb), were designed and synthesized. The organic ligand phenylurea was modified by the silane coupling agent 3-(triethoxysilyl)propyl isocyanate (TESPIC) to form a precursor (L), which was covalently bonded onto a mesoporous SBA-15 backbone to form mesoporous L-SBA15 through co-hydrolysis and co-condensation reactions. 1,10-Phenanthroline monohydrate (phen) was selected as the second ligand to improve the luminescence of the final products, and the two mesoporous hybrid materials Ln(L-SBA15)3phen were obtained after the coordination reaction between the organic ligands (phen and L-SBA15) and Ln(iii) ions...
August 6, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30079426/quench-ionic-flash-nano-precipitation-as-a-simple-and-tunable-approach-to-decouple-growth-and-functionalization-for-the-one-step-synthesis-of-functional-lnpo-4-based-nanoparticles-in-water
#15
Nathalie M Pinkerton, Khadidja Hadri, Baptiste Amouroux, Leah Behar, Christophe Mingotaud, Mathias Destarac, Ihor Kulai, Stéphane Mazières, Stefan Chassaing, Jean-Daniel Marty
A novel, one-step method for the synthesis of functional, organic-inorganic hybrid nanoparticles is reported. The quench ionic Flash NanoPrecipitation (qiFNP) method enables the straightforward synthesis of nanoparticles by decoupling the formation of the inorganic core and surface functionalization. As a proof-of-concept, the qiFNP method was successfully applied for the tunable and highly controlled synthesis of various LnPO4-based nanomaterials for bioimaging applications.
August 6, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/30076653/tenacic-acids-a-new-class-of-tenacious-binders-to-metal-oxide-surfaces
#16
Rajesh Komati, Carl Mitchell, Anastasia LeBeaud, Huy Do, Galina Z Goloverda, Vladimir L Kolesnichenko
The backbone of 2-hydroxyisophthalic acid was identified as a potential metal oxide anchor because of the perfect alignment of all three of its donor groups for binding to inorganic surfaces. It can therefore be used in the design of organic linkers for metal oxide-based hybrid materials. Optimized and scalable methods for the synthesis of 2-hydroxyisophthalic acid (1) and its 5-substituted derivatives: 5-bromo- (2), 5-sulfooxy- (3), 5-hydroxy- (4), and 5-PEG600 (5) are presented. Dynamic Light Scattering (DLS) demonstrated that (2) inhibits Fe(OH)3 precipitation when FeIII aqueous solutions are titrated with NaOH, while similar titrations in the presence of the structurally-related isophthalic and salicylic acids, both missing the third donor group, show turbidity at pHs as low as 2...
August 3, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/30074601/hierarchically-ordered-structures-of-disk-cube-triads-containing-hexa-peri-hexabenzocoronene-and-polyhedral-oligomeric-silsesquioxane
#17
Wei Zhang, Kehua Gu, Pingping Hou, Xiaolin Lyu, Hongbing Pan, Zhihao Shen, Xing-He Fan
Obtaining nanoscale-ordered structures is important for the development of nanotechnology. We designed and synthesized a series of disk-cube triads containing one hexa-peri-hexabenzocoronene (HBC) and two polyhedral oligomeric silsesquioxane (POSS) moieties, HBC-2POSS. The two POSS units were linked via ester or amide bonds. With the amide linkage used, the hydrogen bonding that was introduced affected the balance between the π-π interaction of HBC cores and crystallization interaction of POSS units. Hierarchically ordered structures were obtained from HBC-2POSS triads owing to the synergistic effect of multiple secondary interactions: π-π interaction, hydrogen bonding, and crystallization interaction...
August 3, 2018: Soft Matter
https://www.readbyqxmd.com/read/30067282/recent-advances-in-zeolite-like-cluster-organic-frameworks
#18
Xixiong Li
During the past decade, researches on the design and syntheses of zeolite-like metal-organic frameworks (ZMOFs) have been greatly developed. As an important subclass of ZMOFs, zeolite-like cluster organic frameworks (ZCOFs) built from 4-connected metal cluster secondary building units (SBUs) and appropriate linear organic ligand bridges have attracted sustained interests because such materials not only integrate the merits of inorganic zeolites, ZMOFs and metal clusters, such as charming topologies, high surface areas, extra-large cavities and channels, structural tunability as well as unique physicochemical properties from various metal clusters, but also open up a new avenue to design and fabricate hybrid zeolite-like materials which have many potential applications in material sciences...
August 1, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/30063820/reaching-biocompatibility-with-nanoclays-eliminating-the-cytotoxicity-of-ir-iii-complexes
#19
Malte Christian Grüner, Kassio Papi Silva Zanoni, Camila Borgognoni, Cristiane Casonato Melo, Valtencir Zucolotto, Andrea Simone Stucchi de Camargo
Cyclometalated IrIII complexes are promising candidates for biomedical applications but high cytotoxicity limits their use as imaging and sensing agents. We herein introduce the use of Laponite® as carrier for triplet-emitting cyclometalated IrIII complexes. Laponite® is a versatile nanoplatform due to its biocompatibility, dispersion stability and large surface area that readily adsorbs functional non-polar and cationic molecules. These inorganic-organic hybrid nanomaterials mask cytotoxicity, show efficient cell uptake and increase luminescent properties and photostability...
July 31, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/30062856/efficient-room-temperature-phosphorescence-from-organic-inorganic-hybrid-perovskites-by-molecular-engineering
#20
Hongwei Hu, Fabian Meier, Daming Zhao, Yuichiro Abe, Yang Gao, Bingbing Chen, Teddy Salim, Elbert E M Chia, Xianfeng Qiao, Carsten Deibel, Yeng Ming Lam
Solution-processed organic-inorganic hybrid perovskites are promising emitters for next-generation optoelectronic devices. Multiple-colored, bright light emission is achieved by tuning their composition and structures. However, there is very little research on exploring optically active organic cations for hybrid perovskites. Here, unique room-temperature phosphorescence from hybrid perovskites is reported by employing novel organic cations. Efficient room-temperature phosphorescence is activated by designing a mixed-cation perovskite system to suppress nonradiative recombination...
July 30, 2018: Advanced Materials
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