A novel route for isomerization of ?-pinene oxide at room temperature under irradiation of light-emitting diodes
- Title
- A novel route for isomerization of ?-pinene oxide at room temperature under irradiation of light-emitting diodes
- Creator
- Naikwadi D.R.; Muthukumar D.; Tayade R.J.; Pillai R.S.; Biradar A.V.
- Description
- Present investigation demonstrates the potential use of HY-zeolite for photochemical applications in the selective isomerization of ?-pinene oxide to carveol. In this study, ultraviolet lamp and LED (390 nm) light sources were employed under atmospheric conditions. The results revealed that light penetration through protonated zeolite cavity promotes the hydrogen radical formation, facilitating the isomerization reaction in the presence of dimethylacetamide solvent to achieve up to 60% and 40% conversion of ?-pinene oxide to selective carveol (71%) under light irradiation. Here, using in situ spectroscopic studies (EPR and fluorescence), to confirm the hydrogen radical generation after light irradiation on the reaction mixture. Besides, the mechanistic pathway is proposed based on the experimental evidence of the formation of radicals, which is validated by the Density Functional Theory (DFT). By comparing electrical energy consumption for the same reaction using different reaction setups, it is understood that the energy requirement is nearly the same in the case of a reaction performed using a thermal reactor. The power consumption in reactions conducted using thermal, UV lamp and LED-based reactors was 1.6 kW/h, 1.5 kW/h, and 0.00144 kW/h, respectively. It is clear that the energy consumption in thermal and UV lamp-based reactors is higher than that of LED-based reactors, which was 1111 and 1041 times more than LED reactors respectively. Notably, the catalyst was found to be recyclable at least five consecutive runs, and the successful protocol was demonstrated up to 50 g scale. 2023 Elsevier Ltd
- Source
- Materials Today Chemistry, Vol-33
- Date
- 2023-01-01
- Publisher
- Elsevier Ltd
- Subject
- Carveol; Isomerization; Light-induced reaction; Radical formation; Zeolite
- Coverage
- Naikwadi D.R., Inorganic Materials and Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute, Gujarat, Bhavnagar, 364002, India, Academy of Scientific and Innovative Research (AcSIR), Uttar Pradesh, Ghaziabad, 201002, India; Muthukumar D., Department of Chemistry, Christ University, Karnataka, Bangalore, 560029, India; Tayade R.J., Inorganic Materials and Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute, Gujarat, Bhavnagar, 364002, India; Pillai R.S., Department of Chemistry, Christ University, Karnataka, Bangalore, 560029, India, Analytical and Spectroscopy Division, ASCG/PCM, Indian Space Research Organization, Vikram Sarabhai Space Centre, Thiruvananthapuram- 695 022, Kerala, India; Biradar A.V., Inorganic Materials and Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute, Gujarat, Bhavnagar, 364002, India, Academy of Scientific and Innovative Research (AcSIR), Uttar Pradesh, Ghaziabad, 201002, India
- Rights
- Restricted Access
- Relation
- ISSN: 24685194
- Format
- Online
- Language
- English
- Type
- Article
Collection
Citation
Naikwadi D.R.; Muthukumar D.; Tayade R.J.; Pillai R.S.; Biradar A.V., “A novel route for isomerization of ?-pinene oxide at room temperature under irradiation of light-emitting diodes,” CHRIST (Deemed To Be University) Institutional Repository, accessed February 27, 2025, https://archives.christuniversity.in/items/show/14062.