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Chemical Communications: Chem Comm

M E Ward, M A Daniëls, E C van Kappel, M M Maurice, M Baldus
We report solid-state Nuclear Magnetic Resonance (ssNMR) studies on amyloid-like protein complexes formed by DIX domains that mediate key protein interactions in the Wnt signalling pathway. Our results provide insight into the 3D fold of the self-associated Axin-DIX domain and identify a potential lipid cofactor.
March 21, 2018: Chemical Communications: Chem Comm
Meneka Banik, Nandini Bhandaru, Rabibrata Mukherjee
A versatile colloidal transfer printing method that can be used to transfer any type of particles (polymeric/inorganic) to any type of surface (hydrophobic/hydrophilic; smooth/rough) is reported. The method relies on UV mediated degradation of a sacrificial thin film of polymethylmethacrylate (PMMA), and does not necessitate the use of a transfer medium or modification of the target substrate.
March 21, 2018: Chemical Communications: Chem Comm
Carolin Heiler, Simon Bastian, Paul Lederhose, James P Blinco, Eva Blasco, Christopher Barner-Kowollik
We introduce a mild and efficient avenue to induce the folding of single chain polymer nanoparticles (SCNPs) using visible light. The versatility of the method is based on three folding mechanisms exploiting tetrazole chemistry, i.e., nitrile imine-mediated tetrazole-ene cycloaddition (NITEC), nitrile imine carboxylic acid ligation (NICAL) as well as nitrile imine self-dimerization. To our knowledge, this visible light driven approach is the to-date mildest avenue to fold single polymer chains into compact particles using light...
March 21, 2018: Chemical Communications: Chem Comm
Richard D Adams, Emmanuel J Kiprotich, Mark D Smith
Reaction of Os3(CO)10(NCMe)2 with the triosmium furyne complex Os3(CO)9(μ3,η2-C4H2O)(μ-H)2, 1 yielded the bis-triosmium complex 2 containing a bridging furyenyl ligand by CH activation at the uncoordinated C-C double bond. Heating 2 led to additional CH activation with formation of the first furdiyne C4O ligand in the complex Os3(CO)9(μ-H)2(μ3-η2-2,3-μ3-η2-4,5-C4O)Os3(CO)9(μ-H)2, 3. The furdiyne ligand in 3 was subsequently ring-opened and decarbonylated to yield products 4 and 5 containing novel bridging C3 ligands...
March 21, 2018: Chemical Communications: Chem Comm
Frédéric A Perras, Kasuni C Boteju, Igor I Slowing, Aaron D Sadow, Marek Pruski
We utilize direct 17O DNP for the characterization of non-protonated oxygens in heterogeneous catalysts. The optimal sample preparation and population transfer approach for 17O direct DNP experiments performed on silica surfaces is determined and applied to the characterization of Zr- and Y-based mesoporous silica-supported single-site catalysts.
March 21, 2018: Chemical Communications: Chem Comm
Jiang Ouyang, Liqiang Wang, Wansong Chen, Ke Zeng, Yajing Han, Yan Xu, Qunfang Xu, Liu Deng, You-Nian Liu
Biomimetic nanothylakoids, which are constructed from the thylakoid membrane of vegetable leaves, show high efficiency in tumor microenvironment modulation and photodynamic antitumor therapy under near infrared fluorescence guidance. Furthermore, their outstanding biosafety, facile preparation and low cost make nanothylakoids suitable for further clinical applications.
March 21, 2018: Chemical Communications: Chem Comm
Jing Sun, Wenhui Zhou, Haibo Yang, Xue Zhen, Longfei Ma, Dirk Williams, Xudong Sun, Ming-Fei Lang
The development of flexible and transparent devices requires completely transparent and flexible circuits (TFCs). To overcome the disadvantages of the previously reported TFCs that are partially transparent, lacking pattern control, or labor consuming, we achieve true TFCs via a facile process with precise pattern control, exhibiting concurrent high transparency, conductivity, flexibility, stretchability, and robustness. A highly transparent and flexible conductive film is first made through spin coating silver nanowires (AgNWs) onto polydimethylsiloxane (PDMS), and demonstrates simultaneous high transparency (90...
March 21, 2018: Chemical Communications: Chem Comm
Xue Jin, Dong Yang, Yuqian Jiang, Pengfei Duan, Minghua Liu
Light irradiation was found to trigger the self-assembly of a cyanostilbene-conjugated dialkyl glutamide from nanobelts to nanotoroids, which emitted inverse circularly polarized luminescence.
March 21, 2018: Chemical Communications: Chem Comm
Daniel O'Nolan, David G Madden, Amrit Kumar, Kai-Jie Chen, Tony Pham, Katherine A Forrest, Ewa Patyk-Kazmierczak, Qing-Yuan Yang, Claire A Murray, Chiu C Tang, Brian Space, Michael J Zaworotko
Phases of a 2-fold pcu hybrid ultramicroporous material (HUM), SIFSIX-14-Cu-i, exhibiting 99%, 93%, 89%, and 70% partial interpenetration have been obtained. 1 : 99 C2H2/C2H4 gas separation studies reveal that as the proportion of interpenetrated component decreases, so does the separation performance.
March 21, 2018: Chemical Communications: Chem Comm
Jindan Li, Zijuan Hai, Huiqiong Xiao, Xiaoyi Yi, Gaolin Liang
Nanoprobes are advantageous over small molecular probes in sensitivity but most luminescence molecules used to construct nanoprobes often suffer from an aggregation-caused quenching effect. Herein, we rationally designed a small molecular probe Cys(StBu)-Lys(Ru(bpy)32+)-CBT (1) which "smartly" self-assembled into nanoparticles 1-NPs inside cells with non-quenched, persistent phosphorescence. Employing this property, we successfully applied 1 for long-term sensing of biothiol activity in living HepG2 cells and tumors...
March 21, 2018: Chemical Communications: Chem Comm
Dalton B Burks, Shakeyia Davis, Robert W Lamb, Xuan Liu, Roberta R Rodrigues, Nalaka P Liyanage, Yujie Sun, Charles Edwin Webster, Jared H Delcamp, Elizabeth T Papish
The first example of a CNC pincer ligand with a central pyridinol ligand is reported in a nickel(ii) complex. This metal complex can be protonated or deprotonated reversibly in situ to switch on or off the photocatalytic performance towards CO2 reduction. The O- substituent appears essential for catalysis.
March 21, 2018: Chemical Communications: Chem Comm
Jisun Jang, Sangmoon Byun, B Moon Kim, Sunwoo Lee
Transition metal-catalyzed silylations have typically involved the use of homogeneous non-recyclable catalytic systems. In this work, the first example of a recyclable catalytic system for the synthesis of arylsilanes has been reported, which utilizes the bimetallic complex, Pd-Pt-Fe3O4 nanoparticles. Various arylsilanes were prepared by the reaction of aryl iodides (or bromides) with hydrosilanes. This methodology showed good functional group tolerance toward ester, ketone, aldehyde, nitro, and cyano groups...
March 21, 2018: Chemical Communications: Chem Comm
Liang-Jun Yin, Ying-Lin Liang, Sheng-Hui Zhang, Meng Wang, Langkai Li, Wen-Jie Xie, Hao Zhong, Xian Jian, Xin Xu, Xin Wang, Long-Jiang Deng
A facile approach to fabricate nanoholes on the surface of a phosphor via a carbothermal reaction between C and BaMgAl10O17 was adopted. Drilling nanoholes greatly enhanced excitation light absorption and consequently increased the quantum efficiency, which provided new insight to help improve the luminescence efficiency of oxygen-containing phosphors.
March 21, 2018: Chemical Communications: Chem Comm
Shuai Kang, Mingwei Shang, Matthew A Spence, Michael Andrew, Shuangyi Liu, Junjie Niu
A methodology to screen additives in lead-acid batteries is critical. We developed a three-electrode system that can rapidly check the dynamic charge acceptance (DCA) and hydrogen evolution of electrodes. The electrode with 2% MXene and 0.2% carbon black shows a better DCA, which indicates its great potential in the start-stop technology.
March 21, 2018: Chemical Communications: Chem Comm
Vidhika Punjani, Golam Mohiuddin, Supreet Kaur, Raj Kumar Khan, Sharmistha Ghosh, Santanu Kumar Pal
A new approach accompanied by superstructural frustration is reported. By attaching a cholesterol moiety directly to the central bent-core system it displayed exotic BPIII, BPII/I, Ncyb*, TGBA, SmAPA, SmA and SmX phases as shown by X-ray scattering results. While higher homologues of the series exhibited spontaneous formation of polar order (Ps ∼ 61 nC cm-2) upon applied voltage, the lower homologues showed thermochromic behaviour which can also be trapped via temperature quenching.
March 20, 2018: Chemical Communications: Chem Comm
Abir Goswami, Susnata Pramanik, Michael Schmittel
A catalytically active three-component nanorotor is reversibly self-assembled and disassembled by remote control. When zinc(ii) ions (2 equiv.) are added as an external chemical trigger to the mixture of transmitter [Cu(1)]+ and pre-rotor assembly [(S)·(R)], two equiv. of copper(i) ions translocate from [Cu(1)]+ to the two phenanthroline sites of [(S)·(R)]. As a result, [Zn(1)]2+ forms along with the three-component assembly [Cu2(S)(R)]2+, which is both a nanorotor (k298 = 46 kHz, ΔH‡ = 49.1 ± 0.4 kJ mol-1, ΔS‡ = 9...
March 20, 2018: Chemical Communications: Chem Comm
Yu Xiong, Pingyu Xin, Wenxing Chen, Yu Wang, Shaolong Zhang, Hanlin Ren, Hongpan Rong, Xusheng Zheng, Chen Chen, Qing Peng, Dingsheng Wang, Yadong Li
We successfully obtained truncated octahedron PtAl alloy nanocrystals (∼10 nm) via a facile one-pot strategy. The PtAl nanocrystals exhibited enhanced activity in formic acid electrooxidation compared to commercial Pt/C, which could be ascribed to the large density of defects on the surface as well as the synergy between Pt and Al.
March 20, 2018: Chemical Communications: Chem Comm
Ce Liu, Yujie Liang, Nian Zheng, Bo-Sheng Zhang, Yuan Feng, Siwei Bi, Yong-Min Liang
A Pd- and norbornene-catalyzed domino procedure has been developed to synthesize indoline compounds. This reaction provides efficient access to indolines by employing aryl iodides with aziridines as new electrophiles. The transformation is scalable and tolerates a range of functional groups.
March 20, 2018: Chemical Communications: Chem Comm
Yazhou Qin, Wufan Pan, Dongdong Yu, Yuxiang Lu, Wanghua Wu, Jianguang Zhou
Shape transformation of Au crystals from a {111}-bounded octahedron to a {730}-bounded tetrahexahedron (THH) and then to a {310}-bounded truncated ditetragonal prism (TDP) was achieved by a one pot synthesis method. The transformation of the crystal morphology is the result of the synergistic effect of Ag+ and O2/Cl-. This work not only provides a way to prepare high-index faceted Au micro/nanocrystals, but also provides new insights into the crystal growth habit.
March 20, 2018: Chemical Communications: Chem Comm
Hamidreza Arandiyan, Yuan Wang, Hongyu Sun, Mehran Rezaei, Hongxing Dai
This feature article summarizes the recent progress in porous perovskite oxides as advanced catalysts for both energy conversion applications and various heterogeneous reactions. Recently, research has been focused on specifically designing porous perovskite materials so that large surface areas can be harnessed and surface properties can be improved. Numerous potential applications of porous perovskites have been investigated, including heterogeneous catalysis and air battery applications that rely on interactions and/or reactions of other components with porous perovskites...
March 20, 2018: Chemical Communications: Chem Comm
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