<h3>Title</h3>
<h3>Photoredox C-C Coupling Reactions inside Supramolecular Cavities</h3>
<p><strong><span style="text-decoration: underline;">Abstract</span> :</strong></p>
<p>Enzymes act as nano-vessels which can selectively catalyze chemical reactions by confinement and controlled activation of substrates.<sup>[1]</sup> Chemists have designed supramolecular cavities to mimic enzymes and demonstrated selective product formation.<sup> [2] </sup>Recently it was shown that the photoactivation of weakly polarized sp<sup>3</sup> C-H bonds in water can be selectively done using water-soluble octahedral Pd<sub>6</sub>L<sub>4</sub><sup>12+</sup> nano-cage.<sup> [3]</sup> However, these cages sometime suffer from low catalytic turnover due to product trapping inside the nano-cages.<sup> [4]</sup> In order to solve this issue we have tried photocatalysis via charge transfer mediated pathways inside a square pyramidal Pd<sub>6</sub>L<sub>4</sub><sup>12+</sup> nano-bowl<sup> [5]</sup> which is formed by self-assembly of [Pd(en)(ONO<sub>2</sub>)<sub>2</sub>] complex with triazine based ligands as the cavity walls.  In this seminar, I will discuss our ongoing efforts to optimize and characterize the photocatalytic inter- and intra-molecular C-C coupling reactions between carbon centres having either sp or sp<sup>3</sup> hybridization leading to selective C-C bond formation in water using steady-state and transient absorption spectroscopy. Subsequently, I will show that how the tuning of shape of confinement from octahedral to square pyramidal is leading to different selectivity and faster kinetics.</p>
<p>   References</p>
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