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oai:figshare.com:article/34046068 2026-10-01T13:37:34Z category_4 category_13 category_15 category_21 category_24 category_272 category_873 category_502 category_734 category_61 portal_63 item_type_6 month_year_10_2026

Design Changes That Lead to Large Effects in Photocatalysis: A Ruthenium–Terpyridine Complex Stable and Active Enough to Outperform [Ru(bpy)₃]²⁺ Ilyes Oubaha (23840362) Édouard Dray (25156717) Élodie Rousset (25156720) Mohan Raj Anthony Raj (23024427) William G. Skene (5932334) Amlan K. Pal (1742260) Gabriel M. Mercier (6877163) Valérie Marvaud (1896139) Garry S. Hanan (1720432) Biochemistry Genetics Neuroscience Biotechnology Evolutionary Biology Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Astronomical and Space Sciences not elsewhere classified Biological Sciences not elsewhere classified Developmental Biology enhanced photocatalytic activity cobalt catalyst concentration approximately one order 630 nm ), 2 +</ sup sustained hydrogen production reduced complex species bpy )< sub 2 </ sub production process hydrogen evolution value competitive turnover number turnover frequency significant decrease light ). last showing large effects kinetic competition design changes degradation reactions blue light active enough 8 days 6 days We report here the synthesis of a new heteroleptic ruthenium–terpyridine complex that exhibits both high stability and enhanced photocatalytic activity with an increase of approximately one order of magnitude for the hydrogen evolution reaction coming from a strong push–pull effect. The complex demonstrates high performance under blue light (445 nm), achieving a turnover number (TON) above 3500 mol_H₂ mol_PS^–1 with sustained hydrogen production for over 6 days. That TON value is more than twice as high as that of the reference [Ru(bpy)₃]²⁺ complex under the same conditions. Under red light (630 nm), this complex also shows high efficiency and stability with no significant decrease in the turnover frequency over 6 days, achieving a TON over 960 mol_H₂ mol_PS^-1, a value competitive with reference [Ru(bpy)₃]²⁺ complex under blue light (this last showing no hydrogen evolution under red-light). We identified a kinetic competition between the main H₂ production process and degradation reactions from the reduced complex species and could further enhance the sustainability of the system (under blue light) by increasing the cobalt catalyst concentration. A TON above 4100 mol_H₂ mol_PS^-1 could be reached after 8 days. 2026-10-01T00:00:00Z Text Journal contribution 10.1021/acs.inorgchem.6c02048.s001 https://figshare.com/articles/journal_contribution/Design_Changes_That_Lead_to_Large_Effects_in_Photocatalysis_A_Ruthenium_Terpyridine_Complex_Stable_and_Active_Enough_to_Outperform_Ru_bpy_sub_3_sub_sup_2_sup_/34046068 CC BY-NC 4.0