Fluorometric detection of iodine by MIL-53(Al)-TDC. Issue 20 (27th April 2020)

• Record Type: Journal Article
• Authors: Díaz-Ramírez, Mariana L.; Vargas, Brenda; Raziel Álvarez, J.; Landeros-Rivera, Bruno; Rivera-Almazo, Marcos; Ramos, Carlos; Gabriel Flores, J.; Morales, Eriseth; Vargas, Rubicelia; Garza, Jorge; González-Zamora, Eduardo; Martínez, Ana; Solís-Ibarra, Diego; Ibarra, Ilich A.
• Is Part Of: Dalton transactions. Volume 49:Issue 20(2020)
• Page Start: 6572
• Page End: 6577
• Publication Date: 2020-04-27
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d0dt00945h
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Low concentrations of I2 induce severe changes in the luminescence of MIL-53(Al)-TDC. These results postulate fluorescent MIL-53(Al)-TDC as an efficient I2 detector (potentially for radioactive I2 ), using a simple fluorimetric test. Abstract : The fluorescent properties of MIL-53(Al)-TDC are drastically changed due to the presence of iodine, even in small quantities, as a result of an energy transfer process from the host material (MIL-53(Al)-TDC) to the guest molecule (I2 ). While MIL-53(Al)-TDC's emission spectrum shows a weak and broad band, after I2 adsorption, it exhibits well-resolved and long-lasting emission lines, which could be exploited for iodine detection. Density Functional Theory periodical calculations demonstrated that in the most stable MIL-53(Al)-TDC⋯I2 configuration, the I2 molecule is bonded mainly by an O–H⋯I hydrogen bond. The QTAIM showed that other non-covalent interactions also provided stability to MIL-53(Al)-TDC⋯I2 . The electrostatic potential analysis indicated that the I2 molecule adsorption occurs by a combination of specific interactions with a strong electrostatic contribution and weak interactions. These results postulate fluorescent MIL-53(Al)-TDC as an efficient I2 detector (potentially for radioactive I2 ), using a simple fluorimetric test.