A tụlere akụkọ a dịka usoro na amụma nke Science X si dị. Ndị nchịkọta akụkọ ahụ akọwapụtala àgwà ndị a ma na-ahụ na ọdịnaya ahụ ziri ezi:
Mgbanwe ihu igwe bụ nsogbu gburugburu ebe obibi zuru ụwa ọnụ. Isi ihe na-akpata mgbanwe ihu igwe bụ ọkụ gabigara ókè nke mmanụ ọkụ sitere na fosil. Ha na-emepụta carbon dioxide (CO2), gas griin haus nke na-eme ka okpomọkụ ụwa dị elu. N'ihi nke a, gọọmentị gburugburu ụwa na-emepụta amụma iji belata mwepụta carbon dị otú ahụ. Agbanyeghị, naanị ibelata mwepụta carbon nwere ike ọ gaghị ezu. Ekwesịrị ijikwa mwepụta carbon dioxide. googletag.cmd.push(function() { googletag.display('div-gpt-ad-1449240174198-2′); });
N'akụkụ a, ndị ọkà mmụta sayensị na-atụ aro ka e mee ka carbon dioxide bụrụ ihe ndị a gbakwunyere uru dịka methanol na formic acid (HCOOH). Iji mepụta nke ikpeazụ, a chọrọ isi iyi nke ion hydride (H-), nke hà nhata otu proton na elektrọn abụọ. Dịka ọmụmaatụ, ụzọ mbelata-oxidation nke nicotinamide adenine dinucleotide (NAD+/NADH) bụ ihe na-emepụta ihe na ebe nchekwa nke hydride (H-) na sistemụ bayoloji.
N'ihi nke a, otu ndị nchọpụta nke Prọfesọ Hitoshi Tamiaki si Mahadum Ritsumeikan, Japan, duziri, mepụtara usoro kemịkalụ ọhụrụ site na iji ihe ndị dị ka ruthenium-dị ka NAD+/NADH iji belata CO2 ka ọ bụrụ HCOOH. E bipụtara nsonaazụ nke ọmụmụ ha na akwụkwọ akụkọ ChemSusChem na Jenụwarị 13, 2023.
Prọfesọ Tamiaki kọwara ihe mere o ji mee nnyocha ya. “E gosiri n'oge na-adịbeghị anya na ihe mgbagwoju anya ruthenium nke nwere ụdị NAD+, [Ru(bpy)2(pbn)](PF6)2, na-ebelata fotochemical two-electron. O mere ka ihe mgbagwoju anya NADH [Ru (bpy) )2 (pbnHH)](PF6)2 kwekọrọ na ya n'ihu triethanolamine na acetonitrile (CH3CN) n'okpuru ìhè a na-ahụ anya,” ka o kwuru.
"Tụkwasị na nke ahụ, ịgbasa CO2 ka ọ bụrụ ihe ngwọta [Ru(bpy)2(pbnHH)]2+ na-eme ka [Ru(bpy)2(pbn)]2+ dịghachi ọhụrụ ma na-emepụta ion ndị e ji mee ihe (HCOO-). Agbanyeghị, ọsọ mmepụta ya dị obere. Ọ dị mkpụmkpụ. Ya mere, ịtụgharị H- ka ọ bụrụ CO2 chọrọ sistemụ katalytic ka mma."
Ya mere, ndị nchọpụta enyochaala ọtụtụ ihe ndị na-emepụta ihe na ọnọdụ mmeghachi omume nke na-enyere aka belata mwepụta carbon dioxide. Dabere na nnwale ndị a, ha tụrụ aro mbelata elektrọn abụọ nke ìhè kpatara nke redox pair [Ru(bpy)2(pbn)]2+/[Ru(bpy)2(pbnHH)]2+ n'ihu 1, 3-. Dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole (BIH). Na mgbakwunye, mmiri (H2O) na CH3CN kama triethanolamine mekwuru ka mmepụta ahụ ka mma.

Tinyere nke a, ndị nchọpụta nyochakwara usoro mmeghachi omume nwere ike ime site na iji usoro dịka ngụkọ magnetik nuklia, voltammetry cyclic na spectrophotometry UV-visible. Dabere na nke a, ha chepụtara: Nke mbụ, mgbe a na-ese foto nke [Ru(bpy)2(pbn)]2+, a na-emepụta radical free [RuIII(bpy)2(pbn•-)]2+*, nke na-ebelata ihe ndị a: BIH Nweta [RuII(bpy)2(pbn•-)]2+ na BIH•+. Mgbe nke ahụ gasịrị, H2O na-eme ka mgbagwoju anya ruthenium dị ike wee mepụta [Ru(bpy)2(pbnH•)]2+ na BI•. Ngwaahịa a na-esi na ya pụta adịghị nhata iji mepụta [Ru(bpy)2(pbnHH)]2+ ma laghachi na [Ru(bpy)2(pbn)]2+. A na-ebelata nke mbụ site na BI• iji mepụta [Ru(bpy)(bpy•−)(pbnHH)]+. Ihe mgbagwoju a bụ ihe na-akpali akpali nke na-agbanwe H- ka ọ bụrụ CO2, na-emepụta HCOO- na formic acid.
Ndị nchọpụta ahụ gosiri na mmeghachi omume a tụrụ aro nwere ọnụọgụ mgbanwe dị elu (ọnụọgụ nke moles nke carbon dioxide nke otu moles nke catalyst gbanwere) - 63.
Ndị nchọpụta ahụ nwere obi ụtọ maka nchọpụta ndị a ma nwee olileanya ịmepụta ụzọ ọhụrụ nke ịtụgharị ike (ìhè anyanwụ ka ọ bụrụ ike kemịkalụ) iji mepụta ihe ọhụrụ a na-emegharị emegharị.
"Usoro anyị ga-ebelatakwa mkpokọta carbon dioxide n'ụwa ma nyere aka ịnọgide na-enwe usoro carbon. Ya mere, ọ nwere ike ibelata okpomọkụ ụwa n'ọdịnihu," Prọfesọ Tamiaki gbakwụnyere. "Na mgbakwunye, teknụzụ njem hydride organic ọhụrụ ga-enye anyị ihe ndị bara uru."
Ozi ndị ọzọ: Yusuke Kinoshita et al., Nnyefe hydride organic nke ọkụ na-akpata na CO2** nke ruthenium complexes na-akwado dị ka ihe nlereanya maka di na nwunye redox NAD+/NADH, ChemSusChem (2023). DOI: 10.1002/cssc.202300032

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