939-26-4Relevant articles and documents
A general and efficient method to form self-assembled cucurbit[n]uril monolayers on gold surfaces
An, Qi,Li, Guangtao,Tao, Chengan,Li, Yan,Wu, Yiguang,Zhang, Weixia
, p. 1989 - 1991 (2008)
A general protocol based on spontaneous adsorption of cucurbit[n]uril (CB[n]) molecules through a strong multivalence interaction between CB[n] and gold is described, by which the formation of self-assembled CB[n] monolayers on gold surfaces can be efficiently achieved. The Royal Society of Chemistry.
Fluorescence response of anthracene modified D-π-A heterocyclic chromophores containing nitrogen atom to mechanical force and acid vapor
Zhan, Yong
, (2020)
Three new 9-vinyl anthracene derivatives functionalized naphthalene (ANNP), quinoline (ANQL) and quinoxaline (ANQX) have been synthesized, and they exhibit excellent solid state luminescence. Optical properties and quantum chemical calculations indicate the absence of D-π-A structure in ANNP, and the presence of typical D-π-A structures in ANQL and ANQX. Though the differences between the three molecules are marginal, their stimuli-responsive behaviors are contrasting. Non-heteroatom-assisted ANNP has no clear chromic property. In contrast, heteroatom-assisted ANQL and ANQX show a clear response to external stimuli such as mechanical force (mechanofluorochromism) and protons (acidofluorochromism). On one hand, both of them exhibit contrasting MFC effects. Upon grinding, emission wavelength shifts are 16 nm and 28 nm, respectively. ANQX shows a large spectral change, which might be originated from nitrogen atom induced ICT process and twisted molecular conformation. On the other hand, two molecules show difference acidofluorochromic response. The presence of nitrogen atom leads to the formation of a stable complex between target molecule and TFA. The solution and film of ANQX achieve a fast response to TFA with high sensitivity and low detection limit. The present results suggest that the anthracene modified D-π-A heterocyclic chromophores containing nitrogen atom can achieve fluorescence response to mechanical forces and acid vapor.
METHOD FOR MANUFACTURING AROMATIC NITRILE COMPOUND
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Paragraph 0289-0293, (2021/03/19)
The present invention provides a method for industrially producing a highly pure aromatic nitrile compound and a highly pure aromatic carboxylic acid compound safely and highly efficiently at low costs. Compound (2) is subjected to Willgerodt reaction in the presence of an additive as necessary, and the obtained amide compound (3) is hydrolyzed and neutralized to give carboxylic acid compound (4). Carboxylic acid compound (4) is reacted with a halogenating agent in the presence of a catalyst as necessary in an organic solvent, and further reacted with an amidating agent, and the obtained amide compound (5) or (6) is reacted with a dehydrating agent to give nitrile compound (1). Alternatively, carboxylic acid compound (4) is reacted with a halogenating agent and a compound represented by the formula R6SO2R7 in the presence of a catalyst as necessary in an organic solvent to give nitrile compound (1). Np is a naphthyl group optionally having substituent(s), R5 is an alkylene group having 1-3 carbon atoms, and other symbols are as described in the DESCRIPTION.
Investigating the influence of a CrO42?/Cr2O72? template in the formation of a series of silver-chalcogenide clusters
Li, Yan-Ling,Xu, Qing-Qing,Li, Si,Huang, Ren-Wu,Liu, Xiao-Fei,Wei, Yong-Li,Zang, Shuang-Quan
supporting information, p. 115 - 120 (2019/01/04)
Three new silver-chalcogenide clusters protected by naphthyl ligands are described in this work, namely [Ag14(SCH2C10H7)6(CF3COO)8(DMAc)6] (1), [Ag30(SCH2C10H7)18(CrO4)2(DMAc)2 (CF3COO)8] (DMAc = dimethylacetamide) (2) and {Ag12(SCH2C10H7)6(CF3COO)4(CH3CN)6(Cr2O7)}n (3). Their crystal structures were studied by X-ray crystallography, and they show hollow-core-shell (1), template-core-shell (2) and 1D infinite (3) structures, respectively. The luminescence properties of cluster 1 were investigated, which showed interesting thermochromic variation from red to bright yellow. Moreover, the chromate ions were proven to act as templates in forming the silver clusters through a series of experiments to prepare compounds 2 and 3, which could be considered as derivatives of cluster 1.