Synthesis, Characterization, Investigation of Catalytic and Thermal Properties of Three-Dimensional and Layered Copper Organodiphosphonate Coordination Polymer

Abstract

In this study, (1,4-phenylenebis(methylene))bis(phosphonic acid) ligand (H4L) and its pillared layered copper organodiphosphonate polymer, [Cu2(C8H8O6P2)(H2O)2]n (1), have been synthesized. The structures of the synthesized compounds have been characterized using various spectroscopic and analytical methods. As a result of single crystal X-ray analysis, compound 1 consists of organic/inorganic layers in a three-dimensional and columnar layer structure. This compound crystallizes in the monoclinic space group P21/c, with cell parameters, a = 10.8142(9) Å, b = 7.5839(6) Å, c = 7.3991(6) Å, V = 606.26(9) Å3 and Z= 4. Each copper atom in the polymeric chain has a total of five coordination and is in a partially distorted square pyramid geometry. The heterogeneous catalytic activity and thermal property of 1 have been investigated. TG analysis showed that the catalyst has thermal stability up to 200 ᵒC. By using TBHP, 92.37% thymol conversion occurred at 60 ᵒC and after 12 hours.

Keywords

• Copper organodiphosphonate
• hydrothermal synthesis
• coordination polymer
• thymoquinone

Üç Boyutlu ve Katmanlı Bakır Organodifosfonat Koordinasyon Polimerinin Sentezi, Karakterizasyonu, Katalitik ve Termal Özelliklerinin İncelenmesi

Abstract

Bu çalışmada, (1,4-fenilenbis(metilen))bis(fosfonik asit) ligandı (H4L) ve katmanlı yapıya sahip bakır organodifosfonat polimeri, [Cu2(C8H8O6P2)(H2O)2]n (1), sentezlenmiştir. Sentezlenen bileşiklerin yapıları çeşitli spektroskopik ve analitik yöntemler kullanılarak karakterize edilmiştir. Tek kristal X-ray analizi sonucunda 1 nolu bileşiğin üç boyutlu ve sütunlu tabaka yapısında organik/inorganik katmanlardan oluştuğu gözlenmiştir. Monoklinik kristal sistemi ve P21/c uzay grubunda olan bileşik 1'in hücre parametreleri a = 10.8142(9) Å, b = 7.5839(6) Å, c = 7.3991(6) Å, V = 606.26(9) Å3 ve Z= 4'tür. Polimer zinciri içinde her bir bakır atomu toplam beş koordinasyona sahip olup kısmen bozulmuş kare piramit geometridedir. 1 polimerinin heterojen katalitik aktivitesi ve termal özellikleri incelenmiştir. TG analizi sonuncunda katalizörün 200 ᵒC sıcaklığa kadar termal kararlılığa sahip olduğu gözlenmiştir. TBHP kullanarak 60 ᵒC sıcaklıkta ve 12 saat sonunda %92.37 timol dönüşümü meydana gelmiştir.

Keywords

• Bakır organodifosfonat
• hidrotermal sentez
• koordinasyon polimeri
• timokinon

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