Investigation of the third-order nonlinear optical properties of a cobalt(II) complex constructed from 4,4'-oxydibenzoic acid and 4,4'-(1H-pyrazole-3,5-diyl)dipyridine.

IF 0.7 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY

Acta Crystallographica Section C Structural Chemistry Pub Date : 2025-07-01 Epub Date: 2025-06-11 DOI:10.1107/S2053229625005133

Ning Zhao, Zhaoxun Lian

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引用次数: 0

Abstract

A novel mononuclear cobalt(II) complex, diaquabis[4-(4-carboxyphenoxy)benzoato-κO]bis{4-[3-(pyridin-4-yl)-1H-pyrazol-5-yl]pyridine-κN}cobalt(II), [Co(C₁₄H₉O₅)₂(C₁₃H₁₀N₄)₂(H₂O)₂] or [Co(Hoba)₂(bpp)₂(H₂O)₂] [H₂oba 4,4'-oxydibenzoic acid and bpp is 4,4'-(1H-pyrazole-3,5-diyl)bipyridine], was successfully synthesized via a hydrothermal approach. In this compound, the central Co^II atom exhibits a hexacoordinate octahedral geometry. The complex molecules are interconnected through hydrogen-bonding interactions, constructing a three-dimensional supramolecular framework. UV-Vis absorption spectroscopy revealed two distinct absorption bands at 274 and 367 nm. The third-order nonlinear optical properties were investigated using Z-scan measurements. The results demonstrated pronounced negative refraction behaviour with a nonlinear refractive index n₂ of -1.47 × 10^-12 m² W^-1 and a third-order susceptibility χ⁽³⁾ of 5.62 × 10^-7 esu. These remarkable optical characteristics suggest that this cobalt(II) complex is a potential candidate for advanced photonic applications demanding high-performance third-order nonlinear optical materials.

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由4,4'-氧二苯甲酸和4,4'-（1h -吡唑-3,5-二基）二吡啶构成的钴（II）配合物的三阶非线性光学性质研究。

采用水热法成功合成了一种新型单核钴（II）配合物[4-（4-羧基苯氧基）苯甲酸-κ o]双aquabis[4-[3-（吡啶-4-基）- 1h -吡唑-5-基]吡啶-κ n}钴（II）， [Co(C14H9O5)2(C13H10N4)2(H2O)2]或[Co(Hoba)2(bpp)2(H2O)2] [H2oba 4,4'-氧二苯甲酸和bpp为4,4'-（1h -吡唑-3,5-二基）联吡啶]。在该化合物中，中心的CoII原子呈六坐标八面体结构。这些复杂分子通过氢键相互作用相互连接，构建了一个三维的超分子框架。紫外可见吸收光谱在274 nm和367nm处显示出两个不同的吸收带。利用z -扫描测量研究了三阶非线性光学性质。其非线性折射率n2为-1.47 × 10-12 m2 W-1，三阶磁化率χ(3)为5.62 × 10-7 esu。这些显著的光学特性表明，这种钴（II）配合物是需要高性能三阶非线性光学材料的先进光子应用的潜在候选者。

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来源期刊

Acta Crystallographica Section C Structural Chemistry CHEMISTRY, MULTIDISCIPLINARYCRYSTALLOGRAPH-CRYSTALLOGRAPHY

CiteScore

1.60

自引率

12.50%

发文量

148

期刊介绍： Acta Crystallographica Section C: Structural Chemistry is continuing its transition to a journal that publishes exciting science with structural content, in particular, important results relating to the chemical sciences. Section C is the journal of choice for the rapid publication of articles that highlight interesting research facilitated by the determination, calculation or analysis of structures of any type, other than macromolecular structures. Articles that emphasize the science and the outcomes that were enabled by the study are particularly welcomed. Authors are encouraged to include mainstream science in their papers, thereby producing manuscripts that are substantial scientific well-rounded contributions that appeal to a broad community of readers and increase the profile of the authors.