Synthesis, structure and luminescence properties of a cadmium(II)-based coordination polymer with (S)-4,4'-bis(4-carboxyphenyl)-2,2'-bis(diphenylphosphinoyl)-1,1'-binaphthyl as chiral linker.
作者： Witri Wahyu Lestari , Huayna Cerqueira Streit , Peter Lönnecke , Claudia Wickleder , Evamarie Hey-Hawkins
DOI: 10.1039/C3DT53543F
关键词:
摘要: Solvothermal reaction of cadmium(II) nitrate with (S)-4,4'-bis(4-carboxyphenyl)-2,2'-bis(diphenylphosphinoyl)-1,1'-binaphthyl (H2L) in dimethylformamide (dmf) gave the two-dimensional chiral coordination polymer [{Cd2(L)2(H2O)}·18 dmf]n (1), which is thermally stable up to 400 °C according DTA/TG analysis. According single-crystal X-ray analysis, 1 forms layers [1[combining macron]01] direction, are relatively well separated from each other. Compound L exhibits ligand-based bluish luminescence, assigned S1→S0 transition aromatic units L. Emission spectra consist nearly Gaussian shaped bands maxima at 25,574 and 24,767 cm(-1) for H2L 1, respectively. Quantum efficiency reaches a remarkably high value 42% Cd-based 33% respective ligand. intensity increases 10 K room temperature decreases exponentially temperatures 650 K.
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