| Autor: |
Bej S; Surface Engineering & Tribology Group, CSIR-Central Mechanical Engineering Research Institute, Mahatma Gandhi Avenue, Durgapur 713209, West Bengal, India.; Academy of Scientific & Innovative Research (AcSIR), AcSIR Headquarters CSIR-HRDC Campus, Postal Staff College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad 201002, Uttar Pradesh, India., Das R; Surface Engineering & Tribology Group, CSIR-Central Mechanical Engineering Research Institute, Mahatma Gandhi Avenue, Durgapur 713209, West Bengal, India.; Academy of Scientific & Innovative Research (AcSIR), AcSIR Headquarters CSIR-HRDC Campus, Postal Staff College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad 201002, Uttar Pradesh, India., Murmu NC; Surface Engineering & Tribology Group, CSIR-Central Mechanical Engineering Research Institute, Mahatma Gandhi Avenue, Durgapur 713209, West Bengal, India.; Academy of Scientific & Innovative Research (AcSIR), AcSIR Headquarters CSIR-HRDC Campus, Postal Staff College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad 201002, Uttar Pradesh, India., Banerjee P; Surface Engineering & Tribology Group, CSIR-Central Mechanical Engineering Research Institute, Mahatma Gandhi Avenue, Durgapur 713209, West Bengal, India.; Academy of Scientific & Innovative Research (AcSIR), AcSIR Headquarters CSIR-HRDC Campus, Postal Staff College Area, Sector 19, Kamla Nehru Nagar, Ghaziabad 201002, Uttar Pradesh, India. |
| Abstrakt: |
Separation of C 8 alkyl-aromatics ( o -xylene, m -xylene, and p -xylene) remains one of the most challenging tasks to date due to their similar physical and chemical properties. Cd 2+ - and Zn 2+ -based luminescent metal-organic frameworks (MOFs) have been synthesized for the selective identification of m -xylene in a pool of other isomers by fluorometric methods. Inhibition of the photoinduced electron transfer process is the prime reason for fluorescence enhancement, owing to the comparable molecular orbital energies for m -xylene in comparison with o - and p -xylene. Density functional theory calculations signify that the extraordinary selectivity is mainly due to the high dipole moment of m -xylene that might enhance the ring current, leading to a strong π-π interaction with the MOF's co-ligand. As a practical application, fluorometric sensing could be used for the estimation of m -xylene in different solvent media. Moreover, X-ray structural analysis reveals that the Zn 2+ -MOF can encapsulate m -xylene selectively within its framework among other constitutional isomers, which also emphasizes its capability for practical implementation. |
