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3D semiconducting Co–MOFs based on 5‐(hydroxymethyl)isophthalic acid and imidazole derivatives: syntheses and crystal structures
Author(s) -
Xu Zhong-Xuan,
Ou Chun-Yan,
Zhang Chun-Xue
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/s2053229620004970
Subject(s) - isophthalic acid , hydroxymethyl , imidazole , cobalt , benzene , chemistry , crystallography , crystal structure , stereochemistry , medicinal chemistry , inorganic chemistry , organic chemistry , terephthalic acid , polyester
Two three‐dimensional cobalt‐based metal–organic frameworks with 5‐(hydroxymethyl)isophthalic acid (H 2 HIPA), namely poly[[μ 2 ‐1,4‐bis(2‐methyl‐1 H ‐imidazol‐1‐yl)benzene‐κ 2 N 3 : N 3′ ][μ 2 ‐5‐(hydroxymethyl)isophthalato‐κ 2 O 1 : O 3 ]cobalt(II)], [Co(C 9 H 6 O 5 )(C 14 H 14 N 4 )] n ( 1 ), and poly[tris[μ 2 ‐1,4‐bis(1 H ‐imidazol‐1‐yl)benzene‐κ 2 N 3 : N 3′ ]bis[μ 3 ‐5‐(hydroxymethyl)isophthalato‐κ 2 O 1 : O 3 : O 5 ]dicobalt(II)], [Co 2 (C 9 H 6 O 5 ) 2 (C 12 H 10 N 4 ) 3 ] n ( 2 ), were synthesized under similar hydrothermal conditions. Single‐crystal X‐ray diffraction analyses revealed that 5‐(hydroxymethyl)isophthalate (HIPA 2− ) and 1,4‐bis(2‐methyl‐1 H ‐imidazol‐1‐yl)benzene (1,4‐BMIB) are simple linkers connecting cobalt centres to build a fourfold interpenetration dia framework in complex 1 . However, complex 2 is a pillared‐layer framework with a (3,6)‐connected network constructed by 1,4‐bis(1 H ‐imidazol‐1‐yl)benzene (1,4‐DIB) linkers, 3‐connected HIPA 2− ligands and 6‐connected Co II centres. The above significant structural differences can be ascribed to the introduction of the different auxiliary N ‐donor ligands. Moreover, UV–Vis spectroscopy and Mott–Schottky measurements confirmed that complexes 1 and 2 are typical n‐type semiconductors.