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A New Approach to Sensing H Using SBA‐15 Grafted with Fluorene di‐ammonium Groups and Theoretical study
Author(s) -
Badiei Alireza,
Yadavi Marzieh,
Shayesteh Alireza,
Jafari Maryam,
Ziarani Ghodsi Mohammadi
Publication year - 2016
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201500382
Subject(s) - fluorene , chemistry , fourier transform infrared spectroscopy , bet theory , mesoporous material , raman spectroscopy , grafting , specific surface area , desorption , analytical chemistry (journal) , adsorption , chemical engineering , organic chemistry , polymer , optics , physics , engineering , catalysis
Fluorene‐di‐ammonium‐functionalized mesoporous silica (FDMS) was prepared through post synthesis grafting method of SBA‐15. The obtained material was characterized by means of small and wide angle X‐ray diffraction, nitrogen adsorptiondesorption, Fourier transform infrared spectroscopy, Raman spec‐ troscopy, thermo gravimetric analysis and elemental analysis. The results showed that the original structure of SBA‐15 is preserved after the post grafting procedure. Surface area, pore size and pore volume de‐ creased by attaching functional groups to the pore surface. The grafted amount of fluorene on the surface of SBA‐15 was 0.50 mmol with yield about 40.6 %. The emission spectra of FDMS was studied in acid me‐ dia and discussed in details. Computational studies were performed in order to obtain a detailed electronic description of the mechanism of FDMS fluorescence by H + as well as studying the structure and bonding in the (FDMS)H + . The structural change between FDMS and protonated form can serve as an effective candidate for pH‐indicator, and might be used as acid‐dependent molecular‐sensor models for advanced applications in optical sensors in the future.