Excitation Wavelength and Concentration Dependent Photophysical behaviour of Dipolar Molecular rotors in Solution: Role of Structural Modification
Arivalagan Shabashini1 , Anas Fazal2 , Sumit Kumar Panja2* and Ganesh Chandra Nandi1
1Department of Chemistry, National Institute of Technology-Tiruchirappalli, Tamil Nadu India .
2Tarsadia Institute of Chemical Science, Uka Tarsadia University, Maliba Campus, Gopal Vidyanagar, Bardoli, Mahuva Road, Surat, Gujrat India .
Corresponding author Email: sumitkpanja@gmail.com
DOI: http://dx.doi.org/10.13005/OJPS08.02.05
The present work demonstrates that the twisted intramolecular charge transfer (TICT) and Intramolecular charge transfer (ICT) process can be achieved by structural modification of a molecule. The DMMC (2-(4-(dimethylamino)benzylidene)malononitrile) and DMDC (2-(4-(dimethylamino)benzylidene)malononitrile) exhibit TICT and ICT state respectively via structural modification at the ground state. Solvent-dependent fluorescence enhancement of these molecules is monitored by comparing the relative intensity of locally excited (LE) and ICT emission band from excitation wavelength and concentration-dependent study.Both molecules display the ICT emission process at excited state depending upon excitation wavelength and concentration in solution. Interestingly, aggregation behaviour is also observed during excitation wavelength and concentration-dependent study in H2O. Solvent and excitation wavelength-dependent quenching and enhancement of fluorescence properties are also observed. Dipolar state and molecular orientation may play an important role in excitation and concentration-dependent fluorescence process in solution.
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Shabashini A, Fazal A, Panja S. K, Nandi G. C. Excitation Wavelength and Concentration Dependent Photophysical behaviour of Dipolar Molecular rotors in Solution: Role of Structural Modification.Oriental Jornal of Physical Sciences 2023; 8(2).
DOI:http://dx.doi.org/10.13005/OJPS08.02.05
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Shabashini A, Fazal A, Panja S. K, Nandi G. C. Excitation Wavelength and Concentration Dependent Photophysical behaviour of Dipolar Molecular rotors in Solution: Role of Structural Modification.Oriental Jornal of Physical Sciences 2023; 8(2).Available here:https://bit.ly/3RlsyoX
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