Selective CO2 Adsorption at Low Pressure in Nitrogen-Rich Copper(II) Coordination Polymers

Autor(es)

Tavares Alves Martins, Daniel Oliveira ; Freitas, Rafael Sa ; Da Costa Ferreira, Ana Maria

• Tipo de documento: Artigo Científico
• Fonte: CHEMISTRYSELECT; v. 7, n. 31, p. 9-pg., 2022-08-19.

Resumo

Herein, a series of polymeric copper(II) complexes were obtained using four different triazoles: 3-amino-1,2,4-triazole (HL1), 3,5-diamino-1,2,4-triazole (HL2), 3-amino-1,2,4-triazole-5-carboxylic acid (H(2)L3) and 1,2,4-triazole-3-carboxylic acid (H(2)L4); through solvothermal conditions, under controlled pressure and high temperature, following usual procedures described in the literature. These triazoles were chosen to exploit their different coordination modes to copper(II) metal centres to obtain interesting structures and varied gas adsorption selectivity. The isolated materials were characterized by common spectroscopic techniques (IR, diffuse reflectance UV-Vis, EPR), CHN analyses, X-ray diffraction (XRD), thermogravimetric analyses, and SQUID magnetometry to give an insight into their structure and composition. Besides, they had their BET surface area determined by nitrogen adsorption-desorption isotherms, to assess their porosity. At last, their capacity to adsorb carbon dioxide selectively was also evaluated, in line with those reported for similar systems in the literature. Although having small surface area, these compounds are able to adsorb CO2 selectively at very low pressure (under 600 mbar). (AU)

• Processo FAPESP: 11/50318-1 - Desenvolvimento de compostos com interesse farmacológico ou medicinal e de sistemas para seu transporte, detecção e reconhecimento no meio biológico
• Beneficiário: Ana Maria da Costa Ferreira
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/07937-8 - Redoxoma
• Beneficiário: Ohara Augusto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 18/21510-0 - Síntese e modificação de novas redes metal-orgânicas com alta área superficial e estrutura inédita
• Beneficiário: Daniel de Oliveira Tavares Alves Martins
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Mestrado
• Processo FAPESP: 17/19071-6 - Estudos de complexos metálicos contendo ligantes triazólicos visando à obtenção de MOFs magnéticos multifuncionais
• Beneficiário: Daniel de Oliveira Tavares Alves Martins
• Modalidade de apoio: Bolsas no Brasil - Mestrado