Structurally characterized trinuclear nickel(II) and copper(II) Salamo-type complexes: syntheses, Hirshfeld analyses and fluorescent properties

Unprecedented Dinuclear CuII N,O-Donor Complex: Synthesis, Structural Characterization, Fluorescence Property, and Hirshfeld Analysis

“…This phenomenon of oxime oxygen atom participating in coordination has not been previously reported in the literature [6,9,[11][12][13] and may be due to the catalysis of the Cu II ion upon coordination [16]. Compared with the previously reported M/L as 1:2 [68], 3:2 [69], and 2:2 [70] complexes, it consisted of two Cu II ions and two wholly deprotonated (L 2 ) 2− units. The two Cu II ions (Cu1 and Cu2) have different (N 2 O 3 and N 2 O 2 ) coordination environments.…”

A Newly Synthesized Heterobimetallic NiII-GdIII Salamo-BDC-Based Coordination Polymer: Structural Characterization, DFT Calculation, Fluorescent and Antibacterial Properties

“…The UV-Vis absorption spectrum of H 2 L possesses two strong absorption peaks at about 270 and 318 nm. The peak at 270 nm could be part of the π-π * transition of the benzene rings, and the peak at 318 nm can be part of the intra-ligand π-π * transition of the C=N bonds [11,37]. Compared with the peaks of H 2 L, a new absorption peak is found at about 320 nm upon coordination, which is part of the n-π * transition from the filled pπ orbital of the bridging phenolic O to the vacant d-orbital of the Ni II ions [28,29].…”

“…The salen-like compounds are an important class of Schiff bases having a C 2 axis of symmetry [1][2][3][4][5], and the coordinating group of the salen-like ligands mostly contain two Schiff base N and phenol O atoms on the skeleton [6][7][8][9][10][11] which constitutes a tetradentate N 2 O 2 coordination cavity, and is easy to bind with transition metal ions, alkaline earth metal ions, and rare earth metal ions to obtain various metal complexes such as mononuclear, binuclear, multinuclear, and heteropolynuclear complexes [12][13][14][15][16][17]. Salen and its metal complexes have been researched far and wide [18][19][20][21][22][23] for their excellent catalytic [24,25] and biological activities [26][27][28], magnetic materials [29][30][31][32][33], electrochemical researches [34][35][36][37], supramolecular buildings [38][39][40][41][42], and fluorescence properties [43][44]…”

Insights into crystal structures, supramolecular architectures and antioxidant activities of self‐assembled fluorescent hetero‐multinuclear [Cu (II)‐Ln (III)] (Ln = La, Ce, Pr and Nd) salamo‐like complexes

“…[ 6–12 ] Rare earth, as an indispensable key material in modern society, has attracted more and more attention due to its scarcity of output and value. [ 13,14 ] In recent years, in the research and development of functional materials, the introduction of rare earth elements with unique 4f electronic layer structure and unique physical and chemical properties has been widely developed at home and abroad, and has made great progress, which have open novel possibilities for a broad range of advanced applications, such as electrochemistry, [ 15–18 ] supramolecular buildings, [ 2,19–23 ] catalysis fields, [ 24–26 ] magnetism, [ 27–31 ] biological systems, [ 32–34 ] chemical sensors, [ 35–40 ] luminescence materials, [ 41–45 ] and DFT calculations. [ 46–48 ] Recently, many novel structural 3d–4f complexes have been reported by using salen‐like and salamo‐like N 2 O 2 ‐donor ligands, which also attracted people's attentions.…”