128587-95-1Relevant academic research and scientific papers
Determination and application of the excited-state substituent constants of pyridyl and substituted phenyl groups
Cao, Chao-Tun,Yan, Lu,Cao, Chenzhong
, (2021)
Thirty six 1-pyridyl-2-arylethenes XCH=CHArY (abbreviated XAEY) were synthesized, in which, X is 2-pyridyl, 3-pyridyl and 4-pyridyl and Y is OMe, Me, H, Br, Cl, F, CF3, and CN. Their ultraviolet absorption spectra were measured in anhydrous ethanol, and their wavelengths of absorption maximum λmax were recorded. Also, the 234 λmax values of 1-substituted phenyl-2-arylethylene compounds (XAEY, where X is substituted phenyl) were collected. The excited-state substituent constants (Formula presented.) of three pyridyl groups and 23 substituted phenyl groups (total of 26) were obtained by means of curve-fitting method. Taking the λmax values of 358 samples of bi-arylethene derivatives as a data set and 126 samples of bi-aryl Schiff bases (including nine compounds synthesized by this work) as another data set, quantitative correlation analyses were performed by employing the obtained (Formula presented.) as a parameter, and good results were obtained for the two data sets. The reliability of the obtained (Formula presented.) values was verified. The results of this paper can provide excited-state substituent constants for the study and application of optical properties of conjugated organic compounds containing aryl groups.
Towards rational synthesis of polar solids. Synthesis and X-ray structures of cadmium(n) w
Evans, Owen R.,Lin, Wenbin
, p. 3949 - 3954 (2007/10/03)
Two cadmium(n) coordination polymers, Cd2L'4(n-H2O) 1 and Cd2L24(u-H2O) 2 [L1 = (￡)-4-(2-thiazolyl)ethenylbenzoate, L2 = (￡)-4-(3-pyridyl)ethenylbenzoate] based on /e/o-pyridinecarboxylate bridging ligands, were synthesized by the reactions of cadmium perchlorate and the corresponding benzonitrile precursor ligands under hydro(solvo)thermal conditions. Although both compounds 1 and 2 are constructed from the Cd2L"4(u-H2O) building block, X-ray single crystal structure determinations show that 1 adopts a 2-D polymeric network structure while 2 exhibits a 3-D framework structure as a result of the slightly different configurations of the bridging pyridinecarboxylate ligands. Owing to the presence of the bridging water molecules, both 1 and 2 crystallize in centrosymmetric space groups. The Royal Society of Chemistry 2000.
