Read by QxMD icon Read

Chemistry, An Asian Journal

Zi-Yi Chen, Dennis Y S Tam, Leon Li-Min Zhang, Thomas Chung Wai Mak
A series of seven new complexes including silver-thiolate molecular clusters and their covalent supramolecular frameworks have been assembled from the silver carbide precursor Ag2C2 using a C22- pre-templated approach. Herein, two prototype clusters Ag14(SR)6 and CO3@Agm(SR)10 (R = isopropyl, cyclohexyl or tert-butyl; m = 18 or 20) are employed to construct cluster-based metal-organic frameworks of different dimensions. In particular, both new ellipsoidal tetradecanuclear molecular cluster compounds, namely Ag14(S-iPr)6(CF3CO2)8·DMSO6 (two polymorphic forms 1, 2) and [Ag14(S-Cy)6(CO2CF3)8(DMSO)4] · DMSO3 (3), and a cluster-based metal-organic framework {Ag3[Ag14(S-iPr)6(CF3CO2)11(H2O)3CH3OH] · (H2O)2...
September 15, 2017: Chemistry, An Asian Journal
Rajneesh Misra, Madhurima Poddar
A series of unsymmetrical (D-A-D1, D1-π-D-A-D1 and D1-A1-D-A2-D1) and symmetrical (D1-A-D-A-D1 ) type of phenothiazines 4b, 4c and 5b-5f were designed and synthesized by [2 + 2] cycloaddition-retroelectrocyclization reaction of ferrocenyl substituted phenothiazines with tetracyanoethylene (TCNE) and 7,7,8,8-tetracyanoquinodimethane (TCNQ). The photophysical, electrochemical and computational studies show strong charge-transfer (CT) interaction in the phenothiazine derivatives which can be tuned by the variation of number of TCNE/TCNQ acceptors...
September 13, 2017: Chemistry, An Asian Journal
Leung Chan, Lizhen He, Binwei Zhou, Shouhai Guan, Mingjun Bo, Yahui Yang, Ying Liu, Xiao Liu, Yanyang Zhang, Qiang Xie, Tianfeng Chen
Cancer radiotherapy with 125I seeds demonstrates long-term higher efficacy and lower side effects than traditional X-ray radiotherapy due to its low-dose and continuous radiation but is still limited by radioresistance in clinical applications. Therefore, the design and synthesis for sensitizers that could enhance the sensitivity of cancer cells to 125I seeds is of great importance for future radiotherapy. Selenium nanoparticles (SeNPs) have been found to exhibit high potential in cancer chemotherapy and as drug carriers...
September 11, 2017: Chemistry, An Asian Journal
Chuanhui Zhu, Qun Xu, Liang Ji, Yumei Ren, Mingming Fang
Two dimensional (2D) semiconductors have recently emerged as a remarkable class of plasmonic alternative to conventional noble metals. However, tuning of their plasmonic resonances towards different wavelengths in the visible light region with physical or chemical method still remains challenging. In this work, we design a simple room-temperature chemical reaction route to synthesize the amorphous molybdenum oxide (MoO3-x) nanodots that exhibit strong localized surface plasmon resonances (LSPR) in the visible and near infrared region...
September 8, 2017: Chemistry, An Asian Journal
Fei Li, Fengshou Yu, Jian Du, Yong Wang, Yong Zhu, Xiaona Li, Licheng Sun
Water splitting mediated by electron-coupled-proton buffer (ECPB) provides an efficient way to avoid gas mixing by separating oxygen evolution from hydrogen evolution in space and time. Though electrochemical and photoelectrochemcial water oxidation have been incorporated in such two-step water splitting system, alternative ways to reduce the cost and energy input for decoupling two half-reactions are desired. Herein, we show the feasibility of photocatalytic oxygen evolution in a powder system with BiVO4 as a photocatalyst and polyoxometalate H3PMo12O40 as an electron and proton acceptor...
September 8, 2017: Chemistry, An Asian Journal
Tianlong Wang, Hong Ma, Jin Gao, Xinhong Wang, Yuxia Sun, Yang Luo, Shujing Zhang, Jie Xu
We successfully fabricate well-defined inorganic/organic hybrid Cu2O@Cu/Co-ZIF (ZIF = zeolitic imidazolate frameworks) by use of growth of dual-metal Cu/Co-ZIF on the performed Cu2O hollows. The key point of the strategy is coupling the in situ self-sacrifice of Cu2O and the coordination of metal ions (Cu+ and Co2+) with 2-methylimidazole. This new hybird was characterized by powder X-ray diffraction, (scanning) transmission electron microscopy, energy dispersive spectrometer mapping, in situ FT-IR spectroscopy, UV-Vis diffuse reflection spectroscopy, N2 sorption measurements, and electron spin resonance...
September 8, 2017: Chemistry, An Asian Journal
Shuai Hou, Xiang Zhang, Yanlong Tian, Jiupeng Zhao, Hongbin Geng, Huiying Qu, Hangchuan Zhang, Kun Zhang, Binsheng Wang, A I Gavrilyuk, Yao Li
For the first time, a crystalline-amorphous double-layered NiOx film has been prepared by reactive radio frequency magnetron sputtering, which has exhibited improved electrochemical cycling durability, whereas other electrochromic parameters have been maintained at the required level, i.e. the short coloration/bleaching time (0.8s/1.1s) and an enhanced transmittance modulation range (62.2%) at the wavelength of 550 nm. Besides this, the double-layered film has shown the best reversibility as compared with amorphous and crystalline single-layer films...
September 7, 2017: Chemistry, An Asian Journal
Dianping Tang, Jian Shu
As a newly developing technique, the PEC immunoassay has drawn a great attention in recent years because of its low cost and desirable sensitivity. Since the detecting signal originates from photoelectric conversion of photoelectric materials, the appearance and application of QDs that process unique photophysical properties and regulated optoelectronic characteristics, take the development of PEC immunoassay to a new height. This review concisely introduces the general mechanism of QDs-based photoelectric conversion for immunoassay and summarizes the current advances of QDs applications in immunoassay...
September 7, 2017: Chemistry, An Asian Journal
Fanfan Meng, Chengfen Xing, Hongbo Yuan, Yibing Fan, Ran Chai, Yong Zhan
An assembly has been fabricated and indicated as a multiple-stimulus responsive biomimetic hybrid polymer architecture. It was constructed by the hydrophobic interactions between the conjugated polyfluorene containing 2,1,3-benzothia-diazole units (PFBT) and the tri(ethylene glycol)-functionalized polyisocyanopeptide (3OEG-PIC). The introduction of PFBT to the polyisocyanopeptide (PIC) network allows for the incorporation of multiple-stimulus responsiveness including temperature, CO2, carbonic anhydrase and nonlinear mechanics, which mimics the natural processes and interactions...
September 4, 2017: Chemistry, An Asian Journal
Srinivasan Natarajan, Jagannatha Gopalakrishnan, Sourav Laha, Anupam Bhim
We have explored garnet structured oxide materials containing 3d-transition metal ions (Co2+, Ni2+, Cu2+, Fe3+) for the development of new inorganic colored materials. For this purpose, we have synthesized new garnets, Ca3Sb2Ga2ZnO12 (I) and Ca3Sb2Fe2ZnO12 (II), that are isostructural with Ca3Te2Zn3O12. Substitution of Co2+, Ni2+, Cu2+ at the tetrahedral Zn2+ sites in (I) and (II) gives rise to brilliantly colored materials (different shades of blue, green, turquoise and red). The materials are characterized by optical absorption spectral study and CIE chromaticity diagrams...
September 4, 2017: Chemistry, An Asian Journal
Jingjing Lu, Mei Guo, Jinkui Tang
Single-molecule magnets (SMMs) exhibiting slow relaxation of magnetization of purely molecular origin are highly attractive owing to their potential applications in spintronic devices, high-density information storage and quantum computing. Particularly, lanthanide SMMs have been playing a major role in the advancement of this field because of the large intrinsic magnetic anisotropy of lanthanide metal ions. In this Focus Review, some recent breakthroughs that are changing the perspective of the field will be highlighted with special emphasis on the synthetic strategies towards the design of high-performance SMMs...
September 1, 2017: Chemistry, An Asian Journal
Ge Wang, Haiyan Zheng, Xiubing Huang, Zhenyu Wu, Hongyi Gao, Wenjun Dong
Developing efficient non-noble metal and earth-abundant electrocatalysts with tunable microstructure for overall water-splitting is critical to promote the clean-energy technologies for hydrogen economy. Herein, novel three-dimensional (3D) flower-like Ni2P composed by mesoporous nanoplates with controllable morphology and high surface area was prepared by a hydrothermal method and low-temperature phosphidation as efficient electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER)...
September 1, 2017: Chemistry, An Asian Journal
Hongbo Xia, Suli Wu, Shufen Zhang
Hollow hybrid nanostructure has received significant attention because of its unique structural features. This study reports a facile "ion adsorption-heating" method to fabricate PbS-TiO₂ hybrid hollow particles. In this method, the TiO₂ spheres used as substrate material to grow PbS are aggregates of many small amorphous TiO₂ particles, and each of the small particles is covered by thioglycollic acid ligands through Ti4+-carboxyl coordination. When the Pb2+ ions were added into the TiO₂ spheres colloidal solution, these ions can be adsorbed by sulfydryl (-SH) groups to form metal thiolate, and the C-S bond will be dissociated by heating to release S2-...
August 31, 2017: Chemistry, An Asian Journal
Victor A Brotsman, Daria V Ignat'eva, Sergey I Troyanov
Cage transformations in fullerenes are rare phenomena which are still not fully understood. We report the first skeletal transformation of an Isolated-Pentagon-Rule (IPR) isomer of C78 fullerene upon high-temperature chlorination which proceeds by six-step Stone-Wales rearrangements affording non-IPR, non-classical (NC) C78 (NC2)Cl24 with two cage heptagons, six pairs of fused pentagons, and an unprecedented loop-like chlorination pattern. The following loss of a C2 unit results in C76 (NC3)Cl24 containing three cage heptagons...
August 29, 2017: Chemistry, An Asian Journal
Shuli You, Zheng-Le Zhao, Qing Gu, Xin-Yan Wu
Anilines generally act as N-nucleophiles in transition-metal catalyzed allylic substitution reactions. In this paper, a highly enantioselective intramolecular Friedel-Crafts type allylic alkylation of aniline derivatives was realized by using an iridium catalyst derived from [Ir(cod)Cl]2 and (Ra)-BHPphos. Various tetrahydroisoquinilin-5-amines were obtained in moderate to good yields, excellent enantioselectivity and regioselectivity under mild reaction conditions.
August 28, 2017: Chemistry, An Asian Journal
Chonhwei Zhu, Emmanuel Gras, Carine Duhayon, Francis Lacassin, Xiuling Cui, Remi Chauvin
The coordination chemistry of the a priori weakly -donating nitro-aromatic phosphines is addressed through a series of nitro-substituted (N-phenyl-benzimidazol-1-yl)diphenylphosphines in Rh(I) complexes. From a set of seven such phosphines L = Lxyz(') (x, y, z = 0 or 1 = number of NO2 substituent at the 5, 6 and N-Ph para positions, respectively), including the non-nitrated parent L000 and its dicationic N-methyl counterpart L000', three LRhCl(COD) and seven L2RhCl(CO) complexes have been obtained in 72-95 % yield...
August 28, 2017: Chemistry, An Asian Journal
Guokai Cui, Ning Zhao, Jianji Wang, Congmin Wang
A new strategy using computer-assisted design of substituted imidazolate-based ionic liquids (ILs) through tuning the absorption enthalpy as well as the basicity of ILs for improving SO2 capture, CO2 capture, and SO2/CO2 selectivity was reported. The best substituted imidazolate-based ILs as absorbents for different applications were predicted at first. During the absorption, a high SO2 capacity up to 5.28 and 2.38 mole SO2 per mole IL could be achieved by ILs with CH3-imidazolate anion under 1.0 and 0.1 bar, respectively, through tuning multiple N∙∙∙S interactions between SO2 and N atoms in the imidazolate anion with different substituent...
August 24, 2017: Chemistry, An Asian Journal
Yahong Li, Yaru Qin, Haifeng Zhang, Hao Sun, Yangdan Pan, Yu Ge, Yiquan Zhang
The utilization of 2-ethoxy-6-(((2-hydroxy-3-methoxy benzyl)imino)methyl)phenol (H2L) as a chelating ligand, in combination with the employment of alcohols (EtOH and MeOH) as auxiliary ligands, in the 4f-metal chemistry afforded two series of dinuclear lanthanide complexes of compositions [Ln2L2(NO3)2 (EtOH)2] (Ln = Sm (1), Eu (2), Gd (3), Tb (4), Dy (5), Ho (6), Er (7)) and [Ln2L2(NO3)2(MeOH)2] (Ln = Sm (8), Eu (9), Gd (10), Tb (11), Dy (12), Ho (13), Er (14)). Complexes 1-7 are isomorphous. The two LnIII ions in 1-7 are doubly bridged by two deprotonated aminophenoxide oxygen atoms of two μ2: η0:η1:η2:η1:η1:η0 L2- ligands...
August 24, 2017: Chemistry, An Asian Journal
Qingqing Gu, Yangming Lin, Saskia Heumann, Dangsheng Su
Nanocarbon catalysts are green and sustainable alternatives to the metal-based catalysts for numerous catalytic transformations. The application of nanocarbons for environmental catalysis is an emerging research discipline and has undergone rapid development in recent years. In this focus review, we provide a critical analysis on the state-of-the-art nanocarbon catalysts for three different catalytic desulfurization processes. And the focus is on the advantage and limitation as well as the reaction mechanism of the nanocarbon catalysts at molecular level...
August 24, 2017: Chemistry, An Asian Journal
Dong-Yu Wang, Koki Morimoto, Ze-Kun Yang, Chao Wang, Masanobu Uchiyama
We report a direct cross-coupling reaction between diarylzinc (Ar2 Zn) and aryltrimethylammonium salts (ArNMe3(+) ⋅(-) OTf) in the presence of LiCl, via C-N bond cleavage. The reaction takes place smoothly upon heating in THF without any external catalyst, enabling an efficient and chemoselective formation of biaryl products. Mechanistic studies indicate that the reaction proceeds through a single electron transfer route.
August 22, 2017: Chemistry, An Asian Journal
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"