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<p>The development of multifunctional materials for electronic and photonic devices requires controlled synthesis and a clear understanding of structure–property correlations. In this work, high-quality single crystals of a dicobalt(II) coordination, catena-poly[bis(μ₂-1-(3-carboxyphenyl)-5-methyl-4-oxo-1,4-dihydropyridazine-3-carboxylato-κ<sup>3</sup>-O,O′:O″)hexaqua-dicobalt tetrahydrate] (CMPCC), were grown by a slow-evaporation method under ambient conditions. Single-crystal X-ray diffraction analysis reveals a noncentrosymmetric monoclinic lattice featuring a one-dimensional coordination framework. Optical studies indicate good transparency in the visible region (~ 68%) with a UV cut-off at 341&#xa0;nm, confirming suitability for optoelectronic applications. Nonlinear optical investigations demonstrate a pronounced third-order response from Z-scan measurements, while second harmonic generation efficiency is approximately 5.1 times that of potassium dihydrogen phosphate (KDP). In addition to its optical functionality, CMPCC exhibits room-temperature ferromagnetic behaviour and a measurable piezoelectric coefficient (d₃₃ = 23.44 pC/N), suggesting coupled multifunctional characteristics. Furthermore, the crystal shows efficient ultrafast terahertz emission, indicating potential for broadband photonic applications. The combination of optical, magnetic, piezoelectric, and terahertz responses highlights the potential of this coordination as a SDG multifunctional material for integrated electronic and photonic devices.</p>

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Sustainable multifunctional performance of a dicobalt(II) coordination single crystal for optical, energy, and terahertz applications

  • 期刊论文

  • 发表日期：

    2026年7月3日

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  • P. Vivek

摘要

The development of multifunctional materials for electronic and photonic devices requires controlled synthesis and a clear understanding of structure–property correlations. In this work, high-quality single crystals of a dicobalt(II) coordination, catena-poly[bis(μ₂-1-(3-carboxyphenyl)-5-methyl-4-oxo-1,4-dihydropyridazine-3-carboxylato-κ3-O,O′:O″)hexaqua-dicobalt tetrahydrate] (CMPCC), were grown by a slow-evaporation method under ambient conditions. Single-crystal X-ray diffraction analysis reveals a noncentrosymmetric monoclinic lattice featuring a one-dimensional coordination framework. Optical studies indicate good transparency in the visible region (~ 68%) with a UV cut-off at 341 nm, confirming suitability for optoelectronic applications. Nonlinear optical investigations demonstrate a pronounced third-order response from Z-scan measurements, while second harmonic generation efficiency is approximately 5.1 times that of potassium dihydrogen phosphate (KDP). In addition to its optical functionality, CMPCC exhibits room-temperature ferromagnetic behaviour and a measurable piezoelectric coefficient (d₃₃ = 23.44 pC/N), suggesting coupled multifunctional characteristics. Furthermore, the crystal shows efficient ultrafast terahertz emission, indicating potential for broadband photonic applications. The combination of optical, magnetic, piezoelectric, and terahertz responses highlights the potential of this coordination as a SDG multifunctional material for integrated electronic and photonic devices.