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Structure and photophysical and electrochemical properties of a copper porphyrin complex with a three‐dimensional framework
Author(s) -
Chen Wen-Tong
Publication year - 2020
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229619017273
Subject(s) - porphyrin , copper , electrochemistry , crystallography , crystal structure , chemistry , redox , chloride , materials science , photochemistry , inorganic chemistry , electrode , organic chemistry
Porphyrins and metalloporphyrins can generally show attractive structural motifs and interesting properties. A new copper porphyrin, namely poly[[μ‐chlorido‐[μ 5 ‐5,10,15,20‐tetrakis(pyridin‐4‐yl)‐21 H ,23 H ‐porphine]tricopper(I)] [aquadichloridocopper(II)]], {[Cu 3 (C 40 H 24 N 8 )Cl][CuCl 2 (H 2 O)]} n ( 1 ), was synthesized by the self‐assembly of copper chloride with 5,10,15,20‐tetrakis(pyridin‐4‐yl)‐21 H ,23 H ‐porphine under solvothermal conditions. The structure of this copper porphyrin was characterized by single‐crystal X‐ray crystallography and elemental analysis. The porphyrin macrocycle shows a distorted saddle geometry, with the four pyrrole rings slightly distorted in an alternating mode either upwards or downwards. The copper ions show three‐coordinated triangular and four‐coordinated square‐planar geometries. Every copper–porphyrin unit connects to 12 others via four μ 4 ‐bridging Cu 2 Cl moieties to complete the three‐dimensional framework of compound 1 , with isolated CuCl 2 (H 2 O) units located in the voids. This copper porphyrin displays a red photoluminescence. Electrochemical measurements showed that compound 1 has two redox waves ( E 1/2 = −160 and 91 mV).