Facile recovery of terephthalic acid from PET bottles via acid hydrolysis with nitric acid and applications in synthesis of cobalt MOFs

Author(s)

Seabra, Victor ; Goncalves, Joao M. R. ; Moura, Ana L. S. ; Luna, Vinicius G. ; Santiago, Pedro H. O. ; Ellena, Javier ; Lima-Neto, Benedito S.

• Document type: Journal article
• Source: TRANSITION METAL CHEMISTRY; v. N/A, p. 11-pg., 2024-09-16.

Abstract

Poly(ethylene terephthalate) (PET) taken from postconsumer commercial water bottles was subjected to acid hydrolysis with HNO2 to recover terephthalic acid (H(2)TPA). The H(2)TPA was submitted to mono-nitration with HNO3/H2SO4 to produce 2-nitro-terephthalic acid (NO2-H(2)TPA) in good yield. Both compounds were well characterized by NMR (H-1; C-13; H-1-C-13 HSQC). These two molecules were used as ligands for the syntheses of two new cobalt-based metal-organic frameworks (MOFs) via solvothermal methodology, in dimethylformamide (DMF) or dimethylacetamide (DMA). The MOFs Co-TPA-DMA (1) and Co-(NO2-TPA)-DMF (2) were obtained and characterized by single-crystal X-ray diffraction (SCXRD), powder X-ray diffraction (PXRD) and scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDS). (AU)

• FAPESP's process: 17/15850-0 - X-ray diffraction as a tool in potential drug development
• Grantee: Eduardo Ernesto Castellano
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 23/17102-2 - Sustainable chemistry based on olefin metathesis: development of olefins from bio-molecules via economically viable catalysts.
• Grantee: Benedito dos Santos Lima Neto
• Support Opportunities: Regular Research Grants
• FAPESP's process: 21/10066-5 - Crystallographic and structural study of new substances with potential biological activities
• Grantee: Pedro Henrique de Oliveira Santiago
• Support Opportunities: Scholarships in Brazil - Post-Doctoral