Design and Development of Donor Acceptor Architectures Based on Hydantoin Derivatives towards Optoelectronic Applications

Abstract

In this technologically advanced era, globalization, industrialization and urbanization have caused ecological imbalances leading to global challenges like water scarcity, climate change, ozone depletion and environmental pollution. Pollutants such as VOCs, heavy metals, pesticides and dyes contribute majorly to these issues. Environmental remediation is a pressing concern, but real-time monitoring of these pollutants is challenging due to complex detection methods and lack of portability. However, innovative low-cost optoelectronic systems utilizing organic Dand#61485;A molecule based sensors show promising sensitivity, real-time detection and selectivity through tailored molecular design. newlineThe thesis work presents a comprehensive exploration of fluorescent Dand#61485;A architectures (a) by extending the conjugation on 2TH by incorporating aromatic units and (b) by introducing electron-donating substituents at the C5 position of 2TH ring. Photophysical studies revealed a red shift in absorption spectra in the solid state due to strong intermolecular interactions. SC-XRD analysis found that crystal lattice arrangements are varied based on conjugation and substituted functional groups. Photophysical properties and excited-state gas-phase interactions are studied using SKP, showing the molecules ability to recognize different VOCs. Incorporating aromatic groups and electron-donating substituents into 2TH derivatives generate an efficient Dand#61485;A systems for detecting alcohol and carbonyl-containing VOCs. The structural modifications significantly influence the sensing performance, making these derivatives promising for highly efficient sensing devices newline