Syntheses, structures and catecholase activities of homo‐ and hetero‐trinuclear cobalt(II) complexes constructed from an acyclic naphthalenediol‐based bis(Salamo)‐type ligand

Abstract

3), containing an acyclic naphthalenediol-based ligand H 4 L were synthesized. All the three complexes were characterized by elemental analyses, IR, UV-vis spectra and single crystal X-ray diffraction analyses. Comparative studies of the structures and spectroscopic properties are carried out on these complexes. All of the complexes show catechol oxidase activities in MeCN. Using UV-vis spectroscopy, we monitored the aerial oxidation of 3,5-di-tert-butylcatechol (3,5-DTBCH 2 ) to 3,5di-tert-butylquinone (3,5-DTBQ), which confirms the essential role of these complexes in enhancing the catalytic reaction.

Tri- and Mono-Nuclear Zinc(II) Complexes Based on Half- and Mono-Salamo Chelating Ligands

“…The far-IR spectra (550-100 cm −1 ) of both complexes 1 and 2 were also obtained so as to identify the bonds of Zn-O and Zn-N frequencies. The bands at 447 and 463 cm −1 of complexes 1 and 2 can be attributed to ν(Zn-O), while the bands at 516 and 564 cm -1 are assigned to ν(Zn-N) [52].…”

“…The bands at 447 and 463 cm −1 of complexes 1 and 2 can be attributed to ν (Zn-O) , while the bands at 516 and 564 cm −1 are assigned to ν (Zn-N) [52]. The far-IR spectra (550-100 cm −1 ) of both complexes 1 and 2 were also obtained so as to identify the bonds of Zn-O and Zn-N frequencies.…”

Synthesis and Fluorescence Properties of Asymmetrical Salamo-Type Tetranuclear Zinc(II) Complex

“…The Salamo metal complexes are widely utilized in various fields such as industrial catalyses [18,19], biological fields [20,21], ion recognitions [22][23][24], environmental sciences [25][26][27][28], and magnetic [29,30] and luminescent materials [31][32][33][34][35][36][37][38][39]. Recently, a lot of researchers have tried many approaches to change the (-CH=N-(CH 2 ) n -N=CH-) instead of (-CH=N-O-(CH 2 ) n -O-N=CH-) unit in order to make the exchange reaction and hydrolysis reaction rate of the compounds greatly reduced and the balance level raised to a very great extent, so the Salamo-type compounds are more stable than the Salen-type compounds [40][41][42].…”

Structural and Hirshfeld Surface Analyses of a Novel Hetero-Tetranuclear CuII-NaI Bis(Salamo)-Based Coordination Compound

“…Salen-type ligands and their coordination compounds have been extensively investigated [1][2][3][4][5][6][7][8][9][10] for their catalytic activities [11][12][13][14][15], biological activities [16][17][18][19][20][21][22], supramolecular architectures [23][24][25][26][27][28][29][30][31][32], and fluorescence properties [33][34][35][36][37][38]. To improve the properties of Salen-type ligands, in recent years, Nabeshima and our group's researches mostly concentrated on the syntheses of Salamo-type ligands, which are a class of novel Salen-type analogues [39][40][41][42][43][44][45][46][47][48]…”