Magneto-structural correlation and low temperature heat capacity of a Mn (III) quadridentate Schiff-base coordination compound

Chen, Sanping; Shi, Quan; Xia, Zhengqiang; Yue, Ke-Fen; Gao, Shengli; Woodfield, Brian F.

doi:10.1016/j.jct.2014.02.006

Cited by 11 publications

(2 citation statements)

References 51 publications

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“…+n8.314(/T) 2 exp( /T)/(1+exp( /T)) 2 , (27) 式中, 最后一项为肖特基比热贡献, 主要来自锰原子评述图 6 Mn(III)席夫碱基配位化合物低温比热 [88] Figure 6 Low-temperature specific heats of the Mn(III) Schiff-base coordination compound [88] 核精细结构贡献 [96] 采用精密自动绝热量热仪研究了几种新型配合物相变储热材料的比热性质, 并采用分步加热逐次逼近法得到了该类相变材料的相变温度、相变焓和相变熵 [97] . 熔点测定原理如下:…”

Section: Ac量热unclassified

Low temperature calorimetry and its application in material research

Shi¹,

Tan²,

Yin³

2016

Chin. Sci. Bull.

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Section: Ac量热unclassified

Low temperature calorimetry and its application in material research

Shi¹,

Tan²,

Yin³

2016

Chin. Sci. Bull.

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“…25 Among the polydentate ligands, Schiff bases are attractive due to their potential applications in several areas including catalysis, magneto-structural chemistry, biological applications and analytical chemistry. 26,27 In order to enhance stability, recycle, and production separation, many approaches have been developed to incorporate Schiff base complexes within other materials. The Schiff base complexes are usually embedded on polymeric organic materials like resins, or polystyrene, 28 then supported on inert porous materials such as alumina 29 and zeolite.…”

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The Simultaneous Determination of Ascorbic Acid, Paracetamol, and Caffeine by Voltammetry Method Using Cobalt Schiff Base Complex/SBA-15 Modified Electrode

Hung

Dao

Toàn

et al. 2020

ECS J. Solid State Sci. Technol.

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In this work, the synthesis of cobalt Schiff base complex embedded SBA-15 and simultaneous determination of ascorbic acid (ASA), paracetamol (PAR), caffeine (CAF) by square anodic stripping voltammetry (SqW-ASV) are performed. The cobalt Schiff base complex has been derived from salicylaldehyde, 3(-aminopropyl) triethoxysilane, and cobalt acetate. Cobalt Schiff base complex embedded SBA-15 materials was synthesized via anchoring cobalt Schiff base complex on mesoporous SBA-15. Due to the synergetic effects from the cobalt Schiff base complex (excellent electrochemical properties) and SBA-15 (stable and large surface area) the oxidation peak currents of ASA, PAR and CAF on the modified glassy carbon electrode (GCE) are much higher than those on the Schiff base complex/GCE and bare GCE. The modified electrode exhibited an effective catalytic response to the oxidation of ASA, PAR, and CAF with good reproducibility and stability. The modified GCE has a detection limit of 0.085 μM for ASA, 0.059 μM for PAR and 0.032 μM for CAF. The proposed SqW-ASV method was successfully applied in the simultaneous determination of ASA, PAR and CAF in several pharmaceutical preparations, with results similar to those obtained by high-performance liquid chromatography.

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Synthesis, Crystal Structure and Magnetic Properties of [Mn((1R, 2R)‐Salcy)N₃/NCS] Complexes: Solvent Dependent Crystallization of Monomers, Chains and Dimers.

2017

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Five new chiral MnIII complexes [Mn((1R, 2R)‐Salcy)N3]∞⋅CH3CN (1), [Mn((R,R)‐Salcy)N3]∞ (2), [Mn((R,R)‐Salcy)N3] (4), [Mn((R,R)‐Salcy)(H2O)N3]⋅C4H8O (5) and [Mn((R,R)‐Salcy)NCS] (6) have been synthesized and characterized by X‐ray structural analysis and magnetic measurements (Salcy=N,N′‐bis(salicylidene)‐1,2‐diaminocyclohexane}. The four azido complexes have been obtained from the previously known [Mn((R,R)‐Salcy)(CH3OH)N3] (3) by crystallization from various solvents. Compounds 1 and 2 are trans‐μ‐1,3‐azide bridged coordination polymers. While 1 forms helical chains, the chain in 2 is formed via translation of a dimeric helicate repeat unit. Compound 3 is a methanol coordinated mononuclear azido complex which forms a 2D‐network through H‐bonding. Compounds 4 and 6 are phenoxo‐bridged dimers without inversion center. Compound 5 is an aqua coordinated mononuclear azido complex, which forms a 1D‐chain through O−H⋅⋅⋅N hydrogen bonding involving axial ligands. In all six compounds MnIII exhibits a characteristic Jahn−Teller elongation. The magnetic coupling in 1 and 2 leads to antiferromagnetic interaction along the chain (2 J=−11.6 cm−1 for 1 and –11.9 cm−1 for 2) through the μ‐1,3‐azide bridge. Compound 3 is weakly antiferromagnetic due to hydrogen bonding interactions in the lattice. The phenoxo dimers (4 and 6) do not have measurable exchange interaction, the low temperature susceptibility being influenced mainly by zero‐field splitting.

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Magneto-structural correlation and low temperature heat capacity of a Mn (III) quadridentate Schiff-base coordination compound

Cited by 11 publications

References 51 publications

Low temperature calorimetry and its application in material research

Low temperature calorimetry and its application in material research

The Simultaneous Determination of Ascorbic Acid, Paracetamol, and Caffeine by Voltammetry Method Using Cobalt Schiff Base Complex/SBA-15 Modified Electrode

Synthesis, Crystal Structure and Magnetic Properties of [Mn((1R, 2R)‐Salcy)N₃/NCS] Complexes: Solvent Dependent Crystallization of Monomers, Chains and Dimers.

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Magneto-structural correlation and low temperature heat capacity of a Mn (III) quadridentate Schiff-base coordination compound

Cited by 11 publications

References 51 publications

Low temperature calorimetry and its application in material research

Low temperature calorimetry and its application in material research

The Simultaneous Determination of Ascorbic Acid, Paracetamol, and Caffeine by Voltammetry Method Using Cobalt Schiff Base Complex/SBA-15 Modified Electrode

Synthesis, Crystal Structure and Magnetic Properties of [Mn((1R, 2R)‐Salcy)N3/NCS] Complexes: Solvent Dependent Crystallization of Monomers, Chains and Dimers.

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Synthesis, Crystal Structure and Magnetic Properties of [Mn((1R, 2R)‐Salcy)N₃/NCS] Complexes: Solvent Dependent Crystallization of Monomers, Chains and Dimers.