Tuning the coordination behavior of an unexplored asymmetric multidentate ligand for developing diverse heterometallic architectures with luminescent and magnetic properties

Abstract

Tuning the coordination behavior of a new asymmetric multidentate ligand H3L containing two nitrogen and six oxygen donors by both metal centres and anions, H3L =1-(2-hydroxy-3-methoxy-benzamido)-2-(2-hydroxy-3-methoxy-benzylideneamino)-2-hydroxy propane, three kinds of...

Two luminescent film sensors constructed from new lanthanide coordination polymers for ratiometric detection of Zn2+ and NH3 in water and their white emission properties

“…1 and stated in Table S2,† the coordination spheres of Eu 3+ , Tb 3+ and Gd 3+ in EuL , TbL and GdL were fulfilled by one nitrogen and eight oxygen atoms from three different ligands L and three bidentate nitrates and their geometry could best be described as distorted capped square antiprisms with CShM values of 0.1759, 0.1752, and 0.1729, respectively. 30 Although they are similar to that reported previously where the tetra-monodentate ligand is terminated by thiophene, 21 some differences were observed upon careful investigation. Here TbL was selected as a representative to show their structural features.…”

Two mono‐ and dinuclear Cu (II) complexes derived from 3‐ethoxy salicylaldehyde: X‐ray structures, spectroscopic, electrochemical, antibacterial activities, Hirshfeld surfaces analyses, and time‐dependent density functional theory studies

“…Due to the flexibility and variability of Schiff bases in terms of structure and physical and chemical properties, it has become an attractive research object. [ 1,2 ] Schiff bases form metal complexes with various structures under certain conditions, [ 3–5 ] and these complexes have distinguished roles in photovoltaic materials, [ 6 ] magnetism, [ 7 ] nanomaterial catalysts, [ 8,9 ] capture performance, [ 10 ] nonlinear optical properties, [ 11 ] chemical sensors, [ 12,13 ] fluorescent materials, [ 14 ] and antiviral activity and other fields. [ 15,16 ] Quinazoline has the skeleton of a variety of alkaloids, its derivatives have multiple biological activities and show unusual high affinity for metal ions, also form all kinds of coordination compounds with many transition metals.…”

Anion-Dependent Structure and Luminescence Diversity in ZnII-LnIII Heterometallic Architectures Supported by a Salicylamide-Imine Ligand

“…The combination of Zn 2+ and Ln 3+ within a single species could enable functions derived from both. − However, they are more challenging to design not only due to the coordinative flexibility of lanthanides but also because ligands for Zn 2+ often coordinate well to lanthanides to create homometallic compounds. The salicylamide-imine scaffold, as a semirigid ligand, has multiple coordination sites with certain Lewis acid–base differences as well as a suitable flexibilty to simultaneously coordinate lanthanide and d-block ions to form polynuclear clusters or coordination cycles. − Variations in the lateral spacers or substitution groups on salicylamide or salicylaldimine in these kinds of ligands offer enough chemical flexibility to access a large variety of Zn II -Ln III heterometallic architectures where some of them have been studied in the context of luminescent SMM research. − The structural modulation of Zn II -Ln III heterometallic compounds is of great theoretical and practical significance because the physicochemical properties and applications of heterometallic materials are intimately related to their structures. However, few attempts have been made to systematically demonstrate the effect of control factors on the self-assembly and luminescence of such heterometallic species .…”

“…The salicylamide-imine scaffold, as a semirigid ligand, has multiple coordination sites with certain Lewis acid–base differences as well as a suitable flexibilty to simultaneously coordinate lanthanide and d-block ions to form polynuclear clusters or coordination cycles. − Variations in the lateral spacers or substitution groups on salicylamide or salicylaldimine in these kinds of ligands offer enough chemical flexibility to access a large variety of Zn II -Ln III heterometallic architectures where some of them have been studied in the context of luminescent SMM research. − The structural modulation of Zn II -Ln III heterometallic compounds is of great theoretical and practical significance because the physicochemical properties and applications of heterometallic materials are intimately related to their structures. However, few attempts have been made to systematically demonstrate the effect of control factors on the self-assembly and luminescence of such heterometallic species . In addition, luminescent structural correlations relating the coordination geometry and luminescence properties are relatively scarce and have been proposed as an interesting research direction in molecular luminescence materials. , To demonstrate how the common inorganic anions, NO 3 – and OAc – , dictate the structural outcome of Zn II -Ln III heterometallic species together with the subsequent luminescent properties, three kinds of Zn II -Ln III species (Ln III = Gd III , Tb III ), [Zn 16 Ln 4 L 12 (μ 3 -O) 4 (NO 3 ) 12 ]·8CH 3 CN ( ZnLn-1 ), [Zn 2 Ln 2 L 2 (NO 3 ) 6 ]·3CH 3 CN ( ZnLn-2 ), and [Zn 4 Ln 2 L 8 (OAc) 12 ]· x CH 3 CN ( ZnLn-3 ), based on H 2 L as shown in Scheme have been elucidated by single-crystal X-ray diffraction, powder X-ray diffractometry (PXRD), infrared (IR) spectroscopy, thermogravimetric analysis (TGA), and elemental analyses.…”

“…However, few attempts have been made to systematically demonstrate the effect of control factors on the self-assembly and luminescence of such heterometallic species. 36 In addition, luminescent structural correlations relating the coordination geometry and luminescence properties are relatively scarce and have been proposed as an interesting research direction in molecular luminescence materials. 37,38 To demonstrate how the common inorganic anions, NO 3 − and OAc − , dictate the structural outcome of Zn II -Ln III heterometallic species together with the subsequent luminescent properties, three kinds of Zn II -Ln III species (Ln III = Gd III , Tb III ), [Zn 16 The oxygen from phenoxy, methoxy, and amide groups and nitrogen from the imine group in H 2 L show excellent coordination activity.…”