An antibacterial Co(II) mononuclear compound containing N,N-bis(3,5-dichlorosalicylidene)hydrazine obtained from 3,5-dichlorosalicylaldehyde thiosemicarbazone in hydrothermal conditions

• Published in: Journal of coordination chemistry Vol. 76; no. 9-10; pp. 1173 - 1188
• Main Authors: Wang, Yuan-Peng, Wang, Yu-Chang, Zhang, Xiao, Zhang, Jia-Jia, Liu, Xin-Yue, Wang, Wei-Li, Yan, Wen-Fu, Jin, Juan, Guo, Ying-Chun, Jiang, Ting-Ting
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 19.05.2023; Taylor & Francis Ltd
• Subjects: Aldehydes; antibacterial activity; Antibacterial materials; Benzene; E coli; Hydrazines; Hydrogen bonding; hydrothermal in situ reaction; N-bis(3,5-dichlorosalicylidene)hydrazine; Photoluminescence
• ISSN: 0095-8972; 1029-0389
• DOI: 10.1080/00958972.2023.2233669

A mononuclear compound, [Co(L1) 2 (H 2 O)]·2H 2 O (1), where L1 = N,N-bis(3,5-dichlorosalicylidene)hydrazine, was synthesized under hydrothermal conditions. Note that L1 is derived from the hydrothermal in situ reaction of L2 (L2 = 3,5-dichlorosalicylaldehyde thiosemicarbazone). L2 is prepared by reflux using 3,5-dichlorosalicylic aldehyde and thiosemicarbazide. Although 1 is only a mononuclear structure coordinated with L1, intermolecular hydrogen-bonded interactions between two adjacent mononuclear units creates a 1D supramolecular chain. Furthermore, it self-assembles into a fascinating 2D supramolecular layer via π⋅⋅⋅π stacking between benzene rings of adjacent chains. Hirshfeld surfaces and fingerprint maps of 1 were applied to obtain data on non-covalent interactions. Antibacterial analysis shows that 1 is a potential antibacterial material and the bacteriostasis rate is higher than that of L1 (E. coli: 89.41% for 1, 29.09% for L1; MRSA: 93.17% for 1, 38.54% for L1). The solid and liquid photoluminescence properties of 1 and L1 were also investigated.