A series of 4-amino-1-alkyl pyridinium bromide salts (1-10) were synthesized and antimicrobial activity was evaluated by disc diffusion as well as broth macro-dilution method. 4-Amino-1-hexadecylpyridinium bromide (10) which showed good inhibition against Candida albicans and C. glabrata also displayed good germ tube inhibition against C. albicans. Compound 8 shows very low haemolytic activity against human red blood cells. Compound 10 exhibits excellent antibacterial activity against Escherichia coli and Staphylococcus aureus. Inhibition of phospholipase enzyme secretion was also observed against compound 8 to find the possible mode of action.
Can Remote N-Heterocyclic Carbenes Coordinate with Main Group Elements? Synthesis, Structure, and Quantum Chemical Analysis of N<sup>+</sup>
-Centered Complexes
作者:Neha Patel、Minhajul Arfeen、Radhika Sood、Sadhika Khullar、Asit K. Chakraborti、Sanjay K. Mandal、Prasad V. Bharatam
DOI:10.1002/chem.201705999
日期:2018.4.25
Remote N‐heterocycliccarbenes (rNHCs), such as N‐methyl‐4‐pyridylidene, are known to form coordination complexes with TMs. Herein, it is established that rNHCs can also coordinate to the N+ centre. Synthesis of some novel divalent NI complexes with the general formula (rNHC)→N+←(NHC) and (rNHC)→N+←(rNHC) was achieved, and X‐ray diffraction studies supported the coordination bond character between
The temperature-dependent photoluminescence, dielectric and impedance spectra, as well as crystal structures have been investigated for the iodoplumbate-based hybrid crystal, [C3-Apy][PbI3] (1) (C3-Apy+ = 1-propyl-4-aminopyridinium).