نتایج جستجو برای: mn metal organic framework

تعداد نتایج: 864425  

Journal: :Chemical communications 2014
M Koudia M Abel

On-surface synthesis of tetracyanobenzene molecules with Mn atoms is presented. From metal-organic coordination networks at room temperature, Mn-phthalocyanines and finally small domains of polymeric Mn-phthalocyanines are formed upon annealing on the Ag(111) surface. Step-by-step on-surface reaction is studied in situ by scanning tunnelling microscopy under ultra-high vacuum.

2013
Jun Li Wang Hai Yan Li Yan Bai

A Mn(II) metal-organic framework {[MnL2(NCS)2]·(H2O)4}n (1) with L = bis(pyridin-3-ylmethylene)biphenyl-2,2′-dicarbohydrazide has been synthesized and characterized by IR spectroscopy, elemental analysis, UV spectroscopy, thermogravimetric (TG) analysis, powder X-ray diffraction, and single-crystal X-ray structure determination. The Mn(II) atom has a distorted octahedral coordination environmen...

2014
Haiwei Li Xiao Feng Yuexin Guo Didi Chen Rui Li Xiaoqian Ren Xin Jiang Yuping Dong Bo Wang

A novel porous polymeric fluorescence probe, MN-ZIF-90, has been designed and synthesized for quantitative hydrogen sulfide (H2S) fluorescent detection and highly selective amino acid recognition. This distinct crystalline structure, derived from rational design and malonitrile functionalization, can trigger significant enhancement of its fluorescent intensity when exposed to H2S or cysteine mo...

Journal: Nanochemistry Research 2019

Nano-structured copper oxides were successfully prepared through direct calcination of 1D ladderlike metal-organic framework [Cu2(btec)(2,2'-bipy)2]∞, (btec = 1,2,4,5-benzenetetracarboxylate and 2,2'-bipy = 2,2'-bipyridine) and porous coordination polymer [Cu(BDC)(bipy)](BDCH2), (BDC = 1,4-benzenedicarboxylate; bipy = 4,4'-bipyridine). The nano-structure of the as-synthesized samples are charac...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده کشاورزی 1394

with the increasing population and the need for more food, as well as with the development of science and technology, human approach to unnatural and often chemical inputs to increase agricultural production has been a great expansion and problems such as increased cancers, chronic diseases has created environmental pollution. implementation of organic organic is a solution to these problems . ...

Journal: :Nature communications 2012
Jihyun An Omar K Farha Joseph T Hupp Ehmke Pohl Joanne I Yeh Nathaniel L Rosi

Metal-organic frameworks comprising metal-carboxylate cluster vertices and long, branched organic linkers are the most porous materials known, and therefore have attracted tremendous attention for many applications, including gas storage, separations, catalysis and drug delivery. To increase metal-organic framework porosity, the size and complexity of linkers has increased. Here we present a pr...

2007
C. H. BAMFORD

Two types of photoinitiator are considered: (1) transition metal complexes (mainly carbonyls), (2) chelates of transition metals. In systems of type (1) the metal is in a low oxidation state and an organic halide is generally, but not always, present; on thc other hand, in (2) the metal is initially in a high oxidation state. Comparison between photoand thermal-initiation is made for each type....

Journal: :Angewandte Chemie 2014
Zhonghua Xiang Yuhua Xue Dapeng Cao Ling Huang Jian-Feng Chen Liming Dai

A class of 2D covalent organic polymers (COPs) incorporating a metal (such as Fe, Co, Mn) with precisely controlled locations of nitrogen heteroatoms and holes were synthesized from various N-containing metal-organic complexes (for example, metal-porphyrin complexes) by a nickel-catalyzed Yamamoto reaction. Subsequent carbonization of the metal-incorporated COPs led to the formation of COP-deri...

Journal: :Dalton transactions 2010
Muhammad Arif Nadeem Donald J Craig Roland Bircher John A Stride

A 3D metal-organic framework, [Na{Mn(3)(Hbtc)(2)(btc)}.5H(2)O](n) () (H(3)btc = 1,3,5-benzene tricarboxylic acid), was synthesized under hydrothermal conditions. The structure of was established by single crystal X-ray diffraction analysis; crystallizes in the monoclinic space group P2/c, a = 9.753(3) A, b = 12.751(2) A, c = 14.174(4) A, beta = 109.41(1) degrees . The complex is isostructural t...

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