Syntheses, structures and luminescence of three cadmium coordination polymers based on 1,2-bis(1,2,4-triazol-1-ylmethyl)benzene

Abstract

Three coordination polymers, [Cd(obtz)(NCS)₂] _n (1), [Cd(obtz)₂(dca)₂]_n (2), and {[Cd(obtz)₂(H₂O)₂]·(SiF₆)}_n (3), were synthesized using the flexible 1,2-bis(1,2,4-triazol-1-ylmethyl)benzene (obtz). In 1, obtz connects the [Cd(μ-NCS-N:S)₂]_n 2-D networks into an unusual 3-D cubic network. 2 is comprised of neutral 1-D double chains. Each chain forms π–π stacking interactions with four adjacent chains (two above and two below) to extend a 3-D supramolecular network. 3 consists of 1-D cation chains [Cd(obtz)₂(H₂O)₂]_n and . Three-dimensional supramolecular architecture is formed through hydrogen bond interactions between the coordination waters and uncoordinated 2-position nitrogens of obtz or . Luminescence and thermal stabilities of 1, 2, and 3 were measured.

Keywords:

• Coordination polymer
• Cd(II) complex
• Luminescence
• Structure
• Bis(1,2,4-triazol-1-ylmethyl)benzene

Acknowledgment

This work was supported by the Natural Science Foundation of China (No. 21171126), the Priority Academic Program Development of Jiangsu Higher Education Institutions and the Funds of Key Laboratory of Organic Synthesis of Jiangsu Province.