Copper(II) Schiff Base Complex

Mesomorphic Polymorphs

The same complex yields two polymorphs via different crystallization protocols, with distinct structural phases confirmed by experimental PXRD and thermal analyses, providing a model system for studying polymorph-dependent mesomorphic behavior.

80359868 · Imdadul, Haque · Esteban Garcia, Torres · Herbert, David E. · Wang, Yizhou · Ma, Yanping · Sun, Wenhua · Janiak, Christoph · Enamullah, Mohammed

Journal of Molecular Structure 2026

Specifications

Electron transfer steps

{'zh': '2', 'en': '2'}

Advantages

Two polymorphs from one complex

Using two separate crystallization protocols gives polymorphs 1a and 1b, enabling comparison of how packing affects properties.

Phase identity confirmed by powder XRD

The experimental PXRD profile matches the simulated profile for 1b but differs from that for 1a, allowing rapid identification of the polymorph in bulk powders.

Ligand shows liquid crystal phase

Thermal analyses reveal a liquid crystal phase between crystalline solid and isotropic liquid for HL, which is also confirmed by optical texture observations using polarizing light microscopy.

Applications

• Functional Coordination Compounds：Leverage its quasi-reversible redox and coordination scaffold to build functional metal complexes.
• Polymorph Crystal Engineering：Use the two polymorphs of the same complex to study how crystallization conditions affect packing and phase behavior.
• Liquid Crystal Materials：Ligand HL shows crystalline–liquid crystal–liquid transitions, serving as a precursor for metallomesogen design.
• Electrocatalysis：The complex undergoes two consecutive one-electron reduction steps in DMF, potentially acting as an electron transfer mediator.