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C–H Oxygenation at Tertiary Carbon Centers Using Iodine Oxidant

20.06.2018 | Kensuke Kiyokawa; Ryo Ito; Kenta Takemoto; Satoshi Minakata, Chemical Communication, 2018

An oxidation system in which iodic acid (HIO3) is used as an oxidant in the presence of N-hydroxyphthalimide (NHPI) permitted the selective hydroxylation of tertiary C–H bonds and the lactonization of carboxylic acids containing a tertiary carbon center. These reactions are operationally simple ...

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Water-soluble fluorescent unimolecular micelles: ultra-small size, tunable fluorescence emission from the visible to NIR region and enhanced biocompatibility for in vitro and in vivo bioimaging

20.06.2018 | Xiaoqian Ma; Xiaoxiao Shi; Shuang Bai; Jianjian Zhang; Meili Hou; Tian Zhang; Bao-sheng Li; Peng Xue; Yuejun Kang; Z ..., Chemical Communication, 2018

Fluorescent unimolecular micelles (FUMs) with multicolor emission acting as fluorescent nanoagents for optical fluorescence imaging have, for the first time, been reported. The FUMs show good water-solubility, ultra-small size, and enhanced biocompatibility, which endow the FUMs with versatile ...

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The C‒C to C=C conversion within a supramolecular framework of tetrathiafulvalene: a confinement effect and an oxygen related dehydrogenation

20.06.2018 | Ping Zhang; Peng Huo; Xuan Zhang; Qin-Yu Zhu; Jie Dai, Chemical Communication, 2018

Dehydrogenation of alkanes to generate alkenes is catalyzed by a supramolecular framework of a tetrathiafulvalene derivative under ambient conditions, and a confinement effect of the framework is responsible for the oxidation reaction in the presence of oxygen.

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Rare earth arylsilazido compounds with inequivalent secondary interactions

20.06.2018 | Kasuni C. Boteju; Suchen Wan; Amrit Venkatesh; Arkady Ellern; Aaron J. Rossini; Aaron D. Sadow, Chemical Communication, 2018

A new bulky silazido ligand, –N(SiHMe2)Dipp (Dipp = C6H3-2,6-iPr2), supports planar, three-coordinate homoleptic rare earth complexes Ln{N(SiHMe2)Dipp}3 (Ln = Sc, Y, and Lu), each containing three secondary Ln↼HSi interactions and one agostic CH bond. Y{N(SiHMe2)Dipp}3 and acetophenone react via ...

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Recombinant-fully-human-antibody decorated highly-stable far-red AIEdots for in vivo HER-2 receptor-targeted imaging

20.06.2018 | Yayun Wu; Zhizhen Chen; Pengfei Zhang; Lihua Zhou; Tao Jiang; Huajie Chen; Ping Gong; Dimiter S. Dimitrov; Lintao Ca ..., Chemical Communication, 2018

We developed highly bright and stable far-red emissive AIEdots by using a new kind of click-functional PEG grafted amphiphilic polymer to coat hydrophobic AIE-active polymers (PDFDP). Furthermore, an anti-HER2 recombinant fully human antibody was produced and conjugated on the AIEdots via ...

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DNA-mediated anisotropic silica coating of upconversion nanoparticles

20.06.2018 | Wei Ren; Yingzhu Zhou; Shihui Wen; Hao He; Gungun Lin; Deming Liu; Dayong Jin, Chemical Communication, 2018

We report a facile approach of using DNA molecules as switches to selectively activate silica coating onto specific facets of upconversion nanoparticles. Being simple and reproducible, this method improves the understanding of the silica coating mechanism and opens up new opportunities for ...

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In vivo imaging of hepatocellular nitric oxide using a hepatocyte-targeting fluorescent sensor

20.06.2018 | Peisheng Zhang; Yong Tian; Hui Liu; Junyu Ren; Hong Wang; Rongjin Zeng; Yunfei Long; Jian Chen, Chemical Communication, 2018

Imaging of hepatocellular nitric oxide (NO) in vivo is of great importance for understanding its roles in liver diseases, but such an imaging approach is still lacking. Herein, a hepatocyte-targeting fluorescent NO sensor has been fabricated. This sensor exhibits good water solubility, excellent ...

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Morphogenesis of anisotropic nanoparticles: self-templating via non-classical, fibrillar Cd2Se intermediates

20.06.2018 | Daniel Wurmbrand; Jörg Wolfram Anselm Fischer; Rose Rosenberg; Klaus Boldt, Chemical Communication, 2018

A fibrillar, polymeric intermediate (Cd2Se)n was isolated from the synthesis of CdSe nanorods, which suggests that the reactants themselves can template anisotropic growth. It is shown that high monomer concentration is the principal factor favouring this reaction pathway. The intermediate is ...

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Dual Electrical Switching Permeability of Vesicles via Redox-Responsive Self-Assembly of Amphiphilic Block Copolymers and Polyoxometalates

20.06.2018 | Dandan Chong; Junyan Tan; Jinlong Zhang; Yue Zhou; Xinhua Wan; Jie Zhang, Chemical Communication, 2018

Eletro-responsive vesicles were recently demonstrated based on an amphiphilic block copolymer PEO114-b-P(DCH-Ru)n and an inorganic nanoparticle polyoxometalate H3PMo12O40 (PMo12) via electrostatic interactions. After undergoing electrochemical reactions, vesicle membranes allow the migration of ...

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Central metal dependent modulation of induced-fit gas uptake in molecular porphyrin solids

20.06.2018 | Hirotomo Nishihara; Mao Ohwada; Takuya Kamimura; Masato Nishimura; Hideki Tanaka; Shotaro Hiraide; Minoru Miyahara; ..., Chemical Communication, 2018

Induced-fit accommodation of a variety of gaseous molecules including non-polar molecules has been demonstrated in porphyrin-based supramolecular architectures for the first time. Moreover, the gas uptake behaviour can be modulated by the central cation of porphyrin.

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