Construction of a 2D Co(II) Coordination Polymer with (4,4)-Connected Topology: Synthesis, Crystal Structure, and Surface Photo-electric Property

Abstract

A 2D grid-like (4, 4)-connected topology coordination polymer, [Co(BTA) 2 (H 2 O) 2 ] n (1), where HBTA = 2-(1H-benzotriazol-1-yl)acetic acid, has been synthesized by hydrothermal method and characterized by single crystal X-ray diffraction, IR spectroscopy, elemental analysis and surface photovoltage spectroscopy (SPS). X-ray diffraction analyses indicated that 1 displays octahedral metal centers with secondary building units (SBUs) [Co(BTA) 2 (H 2 O) 2 ] bridged by the BTA − ligands. In the crystal, the 2D supramolecular architecture is further supported by O-H•••O, O-H•••N, C-H•••O hydrogen bonds and π•••π stacking interactions. The SPS of polymer 1 indicates that there are positive response bands in the range of 300-600 nm showing photo-electric conversion properties. There are good relationships between SPS and UV-Vis spectra.

Subtle metal(ii) effects of 2D coordination networks on SCSC guest exchange

“…[32][33][34][35][36][37] Such applications have been achieved via a noteworthy conceptual feature of 2D structures: guest-induced interlayer sliding and stretching via tuning of weak interactions such as van der Waals interactions, ion-dipole forces, hydrogen bonds, and dipoledipole attractions. [38][39][40][41][42] The bulkiness and polarity of adsorbed target molecules can be a significant factor in guest molecule exchange in porous crystalline hosts. 43,44 And certainly, the sliding and stretching of 2D coordination networks are known to be useful as applied to the porous template of liquidcrystal structures, separation of xylene isomers, dye-inclusion platforms as an energy-transfer system, polymorphism materials, efficient heterogeneous catalysts, sensing via interlayer-tuning, recognition and reservoirs of unstable diiodomethane, and chiral recognition in the SCSC mode.…”