| Title: | Interrogating the Behaviour of a Styryl Dye Interacting with a Mesoscopic 2D-MOF and Its Luminescent Vapochromic Sensing |
| Author(s): | di Nunzio MR; Gutierrez M; Moreno JM; Corma A; Diaz U; Douhal A; |
| Address: | "Departamento de Quimica Fisica, Facultad de Ciencias Ambientales y Bioquimica, and INAMOL, Universidad de Castilla-La Mancha, Av. Carlos III, s/n, 45071 Toledo, Spain. Instituto de Tecnologia Quimica, Universitat Politecnica de Valencia-Consejo Superior de Investigaciones Cientificas (UPV-CSIC), Av. de los Naranjos, s/n, 46022 Valencia, Spain" |
| ISSN/ISBN: | 1422-0067 (Electronic) 1422-0067 (Linking) |
| Abstract: | "In this contribution, we report on the solid-state-photodynamical properties and further applications of a low dimensional composite material composed by the luminescent trans-4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM) dye interacting with a two-dimensional-metal organic framework (2D-MOF), Al-ITQ-HB. Three different samples with increasing concentration of DCM are synthesized and characterized. The broad UV-visible absorption spectra of the DCM/Al-ITQ-HB composites reflect the presence of different species of DCM molecules (monomers and aggregates). In contrast, the emission spectra are narrower and exhibit a bathochromic shift upon increasing the DCM concentration, in agreeance with the formation of adsorbed aggregates. Time-resolved picosecond (ps)-experiments reveal multi-exponential behaviors of the excited composites, further confirming the heterogeneous nature of the samples. Remarkably, DCM/Al-ITQ-HB fluorescence is sensitive to vapors of electron donor aromatic amine compounds like aniline, methylaniline, and benzylamine due to a H-bonding-induced electron transfer (ET) process from the analyte to the surface-adsorbed DCM. These findings bring new insights on the photobehavior of a well-known dye when interacting with a 2D-MOF and its possible application in sensing aniline derivatives" |
| Keywords: | "Aniline Compounds/chemistry Coloring Agents/*chemistry *Luminescence Metal-Organic Frameworks/*chemistry Spectrometry, Fluorescence Thermodynamics Time Factors Volatilization aggregates host-guest interaction hybrid materials luminescent vapochromic sensi;" |
| Notes: | "Medlinedi Nunzio, Maria Rosaria Gutierrez, Mario Moreno, Jose Maria Corma, Avelino Diaz, Urbano Douhal, Abderrazzak eng MAT2017-86532-R/Ministry of Economy, Industry and Competitiveness/ PID2020-116519RB-I00/MICINN/ PID2020-112590GB-C21/ AEI / 10.13039/501100011033/MICINN/ SBPLY/19/180501/000212/Regional Government of Castile-La Mancha/ Switzerland 2022/01/12 Int J Mol Sci. 2021 Dec 28; 23(1):330. doi: 10.3390/ijms23010330" |
