A 2D coordination polymer assembled from a nickel(II) tetraazamacrocyclic cation and 4,4′-(dimethylsilanediyl)diphthalate(3–) linker
作者:Sergey P. Gavrish、Sergiu Shova、Maria Cazacu、Yaroslaw D. Lampeka
DOI:10.1107/s2053229620005008
日期:2020.5.1
reactants and longer reaction time, single crystals of composition [Ni(L)}3(HA)2]·4CH3OH}n (II·MeOH) were isolated. Single‐crystal X‐ray diffraction analysis of this compound, which, according to PXRD is isostructural with II·H2O but different from I·DMF, revealed its two‐dimensional (2D) polymericstructure, i.e. poly[[bisμ3‐4‐[(4‐carboxy‐3‐carboxylatophenyl)dimethylsilyl]benzene‐1,2‐dicarboxylato‐κ3O1:O2:O3′}tris(1
当在DMF中用4,4'-(二甲基硅烷二基)二邻苯二甲酸(H 4 A)处理时,由14元大环配体1,4,8,11-四氮杂环十四烷(cyclam,L)形成的镍(II)配合物/ H 2 O混合物(4:1 v / v)在加热下,产生[Ni(L)] 3(HA)2 ·3DMF(I·DMF)。将该化合物重新溶解于DMF / H 2 O / MeOH混合物(4:1:30 v / v / v)中,并在温和加热下进行轻度酸化,结果形成了类似的化合物,但其中含有水和结晶的甲醇分子,[你(L)] 3(HA)2 ·5H 2 O·2MeOH(II·H 2 O)。在较低的温度和反应物的浓度下以及较长的反应时间下,分离出组成为[Ni(L)} 3(HA)2 ]·4CH 3 OH} n(II·MeOH)的单晶。根据PXRD对该化合物的单晶X射线衍射分析表明,该化合物与II·H 2 O是同构的,但不同于I·DMF,揭示了其二维(2D)聚合物结构,即聚[[bis
Blue light-emitting polyamide and poly(amide-imide)s containing 1,3,4-oxadiazole ring in the side chain
exhibit film forming ability and good solubility in many organic solvents. They show high thermal stability, with decomposition temperature being above 420 °C. The optical properties, absorption and fluorescence characteristics, in solution and solid state, are investigated. Solutions of the polymers exhibit fluorescence in the blue region, having high quantum yield in the range of 38.5–58.1%, and
dianhydride, diacid, and derived supramolecular polymers were investigated by Fourier transform infrared (FTIR) and protonmagneticresonance (1H NMR) spectroscopy. Self‐assembling was proved by the presence of the IR absorption bands around 1900 and 2400 cm−1 specific for hydrogen bond. The association constant values were estimated by using FTIR spectroscopy in solid state. According to X‐ray diffraction
由双(3,4-二羧基苯基)二甲基硅烷酐与对氨基苯甲酸反应制得的双[ N-(4-羧基苯基)邻苯二甲酰亚胺基]二甲基硅烷已被用于构建三种新型的氢键合超分子聚合物。吡啶衍生物:4,4'-联吡啶(SP1),1,2-双(4-吡啶基)乙烯(SP2)和4,4'-偶氮吡啶(SP3)。通过傅立叶变换红外(FTIR)和质子磁共振(1 H NMR)光谱研究了二酐,二酸和衍生的超分子聚合物的结构。1900和2400 cm -1附近的红外吸收带的存在证明了自组装特异于氢键。通过使用固相的FTIR光谱估计缔合常数值。根据X射线衍射研究,双(3,4-二羧基苯基)二甲基硅烷酸酐(1)具有孤立的分子结构。双[ Ñ - (4-羧基苯基)phtalimidyl]二甲基硅烷(2)分子在晶体结构通过二聚ö相关 ħ ...导致波浪1D超分子链O氢键键。SP1和SP3的主要包装基序由4,4'-联吡啶或4,4'-偶氮吡啶和bis [
Sava, Ion; Bruma, Maria, Revue Roumaine de Chimie, 2005, vol. 50, # 9-10, p. 791 - 798
作者:Sava, Ion、Bruma, Maria
DOI:——
日期:——
Di- and tetracarboxylic aromatic acids with silane spacers and their copper complexes: Synthesis, structural characterization and properties evaluation
Two polycarboxylic acids, bis(p-carboxyphenyl)diphenylsilane and bis(3,4-dicarboxyphenyl)dimethylsilane, were prepared according to published procedures and characterized, besides elemental and spectral analysis, for the first time by X-ray single crystal diffraction. Their copper(II) complexes were obtained in the presence of 1,10-phenantroline as co-ligand, the crystallographic data revealing the formation of 2D structures through hydrogen bonds. The hydrogen bond dynamics of the copper complexes was studied by FTIR-ATR spectrometry. The thermal stability of the acids and derived copper complexes was evaluated by thermogravimetrical analysis. The moisture uptake capacity and porosity of the complexes were estimated on the basis of the water vapour sorption measurements in dynamic regime. Magnetic measurements performed on the two metal complexes correspond to not interacting copper(II) with S - 1/2 and g factor equal to 2.14 and 2.19 being consistent with pentacoordinated Cu(II) paramagnetic centres. (C) 2014 Elsevier B.V. All rights reserved.