02281nas a2200229   4500008004100000022001400041245012600055210006900181260000900250300001600259490000700275520144800282653002001730653002101750100002201771700001901793700002501812700002801837700003001865700002401895856013201919       2023                        eng d  a1477-922600aElectrocatalytic hydrogen evolution mediated by an organotelluroxane macrocycle stabilized through secondary interactions0 aElectrocatalytic hydrogen evolution mediated by an organotelluro  cNOV   a17242-172480 v523 a<p>A discrete liphophilic organotelluroxane macrocycle has been found to catalyse the hydrogen evolution reaction (HER) by proton reduction efficiently. The macrocycle is synthesized via chloride abstraction from bis(p-methoxyphenyl) tellurium dichloride (p-MeOC6H5)2TeCl2 (1) by silver salts AgMX4 (MX4 = BF4-, and ClO4-) resulting in in situ generated di-cationic tetraorganoditelluroxane units; two such units are held together by two weak anions mu 2-MX4, bridging to form 12-membered di-cationic macrocycles [((p-MeO-C6H4)2Te)2(mu-O)(mu 2-F2BF2)2]2+ (2) and [((p-MeO-C6H4)2Te)2(mu-O)(mu 2-O2ClO2)2]2+ (3) stabilized via Te-(mu 2-BF4/ClO4), with secondary interactions. The charge is balanced by the presence of two more anions, one above and another below the plane of the macrocycle. Similar reaction at higher temperatures leads to the formation of telluronium salts R3TeX [X = BF4- (4), ClO4- (5)] as a major product. The BF4- anion containing macrocycle and telluronium salt were monitored using 19F NMR. HRMS confirmed the structural stability of all the compounds in the solution state. The organotelluroxane macrocycle 2 has been found to act as an efficient electrocatalyst for proton reduction in an organic medium in the presence of p-toluene sulfonic acid as a protic source. A discrete liphophilic organotelluroxane macrocycle has been found to catalyse hydrogen evolution reaction (HER) by proton reduction efficiently.</p>
10aAnion Transport10aProton-Reduction1 aNarsimhulu, Gujju1 aSamuel, Calvin1 aPalani, Sathishkumar1 aDasari, Sai, Hemant Kum1 aKrishnamoorthy, Kothandam1 aBaskar, Viswanathan  uhttps://library.ncl.res.in/content/electrocatalytic-hydrogen-evolution-mediated-organotelluroxane-macrocycle-stabilized-through