نتایج جستجو برای: halide

تعداد نتایج: 6985  

Journal: :Chemical communications 2014
Houssein Ibrahim Régis Guillot Federico Cisnetti Arnaud Gautier

The preparation under protic conditions of the first μ-hydroxo dicopper(I)-NHC complex is reported. Its application as a CuAAC catalyst was investigated, evidencing a remarkable enhancement of catalytic efficiency in the presence of 4,7-dichloro-1,10-phenanthroline and highlighting the beneficial effect of the absence of coordinating halides.

Journal: :Physical chemistry chemical physics : PCCP 2016
Tejas S Sherkar L Jan Anton Koster

The power conversion efficiency of photovoltaic cells based on the use of hybrid halide perovskites, CH3NH3PbX3 (X = Cl, Br, I), now exceeds 20%. Recently, it was suggested that this high performance originates from the presence of ferroelectricity in the perovskite, which is hypothesized to lower charge recombination in the device. Here, we investigate and quantify the influence of mesoscale f...

Journal: :Chemical communications 2009
Chang-Chuan Chou Hsueh-Ju Liu Lucas Hung-Chieh Chao

The first paradigm of halide-controlled interconversion between two- and three-coordinate copper(i) complexes, [Cu(L(Ph))](ClO(4)) (1?ClO(4)) and [Cu(L(Ph))I] (2), where L(Ph) = 1,3-bis-(3,5-dimethyl-pyrazol-1-ylmethyl)-2-phenyl-2,3-dihydro-1H-perimidine, was presented, which can result in reversible fluorescence changes.

2012
Man-Lung Kwan Sara J. Conry Charles S. Carfagna Loren P. Press Oleg V. Ozerov Norris W. Hoffman Richard E. Sykora

The title compound, [Ni(C(18)H(30)FO(2)P(2))(C(3)H(4)N(2))]PF(6), was prepared by halide abstraction with TlPF(6) in the presence of CH(3)CN in CDCl(3) from the respective neutral pincer chlorido analogue followed by addition of pyrazole. The PO-C-OP pincer ligand acts in typical trans-P(2) tridentate fashion to generate a distorted square-planar nickel structure. The Ni-N(pyrazole) distance is...

2015
Sergii Yakunin Loredana Protesescu Franziska Krieg Maryna I. Bodnarchuk Georgian Nedelcu Markus Humer Gabriele De Luca Manfred Fiebig Wolfgang Heiss Maksym V. Kovalenko

emission and lasing from colloidal nanocrystals of caesium lead halide perovskites Sergii Yakunin, Loredana Protesescu, Franziska Krieg, Maryna I. Bodnarchuk, Georgian Nedelcu, Markus Humer, Gabriele De Luca, Manfred Fiebig, Wolfgang Heiss & Maksym V. Kovalenko Nature Communications 6:8056 doi: 10.1038/ncomms9056 (2015); Published 20 Aug 2015; Updated 23 Sep 2015 In Fig. 5d of this Article, a s...

2017
Hiromitsu Takaba Shou Kimura Md. Khorshed Alam

Durability of organo-lead halide perovskite are important issue for its practical application in a solar cells. In this study, using density functional theory (DFT) and molecular dynamics, we theoretically investigated a crystal structure, electronic structure, and ionic diffusivity of the partially substituted cubic MA0.5X0.5PbI3 (MA = CH3NH3+, X = NH4+ or (NH2)2CH+ or Cs+). Our calculation re...

Journal: :Nano letters 2018
Andrew Barnabas Wong Yehonadav Bekenstein Jun Kang Christopher S Kley Dohyung Kim Natalie A Gibson Dandan Zhang Yi Yu Stephen R Leone Lin-Wang Wang A Paul Alivisatos Peidong Yang

Within the last several years, metal halide perovskites such as methylammonium lead iodide, CH3NH3PbI3, have come to the forefront of scientific investigation as defect-tolerant, solution-processable semiconductors that exhibit excellent optoelectronic properties. The vast majority of study has focused on Pb-based perovskites, which have limited applications because of their inherent toxicity. ...

2014
Satoshi Kamiguchi Sayoko Nagashima Teiji Chihara

Halide clusters have not been used as catalysts. Hexanuclear molecular halide clusters of niobium, tantalum, molybdenum, and tungsten possessing an octahedral metal framework are chosen as catalyst precursors. The prepared clusters have no metal–metal multiple bonds or coordinatively unsaturated sites and therefore required activation. In a hydrogen or helium stream, the clusters are treated at...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید