A Family of Luminescent Halido Cadmates with Bifunctional Diammonium Cations

IF 2 4区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR

European Journal of Inorganic Chemistry Pub Date : 2025-07-14 DOI:10.1002/ejic.202500264

Meng Yang, Ralph Otmar Kusche, Sebastian Anhäuser, Jakob Möbs, Gregor Witte, Johanna Heine

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Abstract

This study presents the synthesis, single crystal structures, and optical properties of a series of six halido cadmates featuring the diammonium cations 4-(ammoniomethyl)pyridinium (H₂AMP²⁺) and 4-(ammonioethyl)pyridinium (H₂AEP²⁺). The chlorido cadmates (H₂AMP)₂Cd₃Cl₁₀·4H₂O (1) and (H₂AEP)₄Cd₅Cl₁₈ (2) feature complex polymeric anion motifs, while the bromido and iodio cadmates (H₂AMP)CdBr₄·H₂O (3), (H₂AEP)CdBr₄ (4), (H₂AMP)CdI₄ (5), and (H₂AEP)CdI₄ · H₂O (6) are composed of mononuclear {CdX₄} units (X = halogen) packed in different arrangements. (H₂AEP)₄Cd₅Cl₁₈ (2) displays a phase transition between 100 K and room temperature, which is studied in detail. All compounds show decomposition temperatures above 180 °C. Optical bandgaps of the compounds are estimated in the range from 3.4 to 4.4 eV, with all compounds showing significant sub-bandgap absorption. Compounds 1–6 also show broad low-temperature emission centred between 1.95 and 2.5 eV.

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一类具有双官能团二铵离子的发光卤代化合物

本文研究了以4-（氨乙基）吡啶（H2AMP2+）和4-（氨乙基）吡啶（H2AEP2+）为二铵阳离子的一系列六卤代化合物的合成、单晶结构和光学性质。氯基分子（H2AMP）2Cd3Cl10·4H2O(1)和（H2AEP）4Cd5Cl18(2)具有复杂的阴离子基序，而溴基分子和碘基分子（H2AMP）CdBr4·H2O(3)、（H2AEP）CdBr4(4)、（H2AMP）CdI4(5)和（H2AEP）CdI4·H2O(6)是由不同排列方式的单核{CdX4}单元（X =卤素）组成。（H2AEP）4Cd5Cl18(2)在100 K至室温之间发生相变，并对其进行了详细研究。所有化合物的分解温度均在180℃以上。化合物的光学带隙在3.4 ~ 4.4 eV范围内，所有化合物都表现出明显的亚带隙吸收。化合物1 ~ 6在1.95 ~ 2.5 eV之间也有广泛的低温发射。

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来源期刊

European Journal of Inorganic Chemistry 化学-无机化学与核化学

CiteScore

4.30

自引率

4.30%

发文量

419

审稿时长

1.3 months

期刊介绍： The European Journal of Inorganic Chemistry (2019 ISI Impact Factor: 2.529) publishes Full Papers, Communications, and Minireviews from the entire spectrum of inorganic, organometallic, bioinorganic, and solid-state chemistry. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies. The following journals have been merged to form the two leading journals, European Journal of Inorganic Chemistry and European Journal of Organic Chemistry: Chemische Berichte Bulletin des Sociétés Chimiques Belges Bulletin de la Société Chimique de France Gazzetta Chimica Italiana Recueil des Travaux Chimiques des Pays-Bas Anales de Química Chimika Chronika Revista Portuguesa de Química ACH—Models in Chemistry Polish Journal of Chemistry The European Journal of Inorganic Chemistry continues to keep you up-to-date with important inorganic chemistry research results.