Structural and Electronic Characterization of a Photoresponsive Lanthanum(III) Complex Incorporated into Electrospun Fibers for Phosphate Ester Catalysis

Izadora F. Reis, Flávio B. Miguez, Carlos A. Amaya Vargas, Thiago G. Menzonatto, Igor Maciel Souza Silva, Thiago Verano-Braga, Juliana Fedoce Lopes, Tiago A. S. Brandão, Frederico B. De Sousa

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Herein, we present the light-induced synthesis and characterization of a La3+/spiropyran derivative complex (LaMC) and its application as a catalyst when incorporated into electrospun polycaprolactone (PCL) fibers. In addition to experimental methods, computational calculations were also essential to better understand the structure and electronic characteristics of LaMC. The LaMC complex was identified as a 10-coordinated structure with the La3+ ion coordinated by four oxygens from the phenolate and the carbonyl of the carboxyl acid group from both MC ligands and by six oxygens from three nitrate ligands. In addition, LaMC was capable of getting reversibly isomerized by UV or visible light cycling. All PCL fibers were successively obtained, and their morphologies, surface properties, and catalytic behavior were studied. Results showed that PCL/LaMC fibers were capable of catalyzing bis(2,4-dinitrophenyl)phosphate degradation efficiently. Complete hydrolysis was accomplished in only 1.5 days relative to the half-life time of 35 days for the uncatalyzed hydrolysis at pH 8.1 and 25 °C.
Original languageEnglish
JournalACS applied materials & interfaces
Volume12
Issue number25
Number of pages28,607
ISSN1944-8244
DOIs
Publication statusPublished - 24. Jun 2020
Externally publishedYes

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