Lembe eni judwoko wange nimakere ku cik pa Science X. Ju goro gi ketho cwiny ikum kit ma e ma gi gwoko bedoleng pa lembe:
Lokruok pa kite ma koth ku ceng ryeny kudu ubedo peku mi ngom zoo. Piny madit ma nyayu aloka loka pa kite ma koth ku ceng ryeny kudu utiye wango piny ma wok kud i ngom. Giwodho carbon dioxide (CO2), ma en e yamu ma nyayu lyethu i ng'om. Nimakere ku lembe eni, gavumente mi ng'om zoo gibe yubu cik mi jwigo lyethu ma rac ma rac. Ento, dwoko piny kende kende yamo ma rac copo bedu piny ma romo ngo. Woth pa yamo ma rac de umitu juyik. googletag.cmd.push(function() { googletag.display('div-gpt-ad-1449240174198-2′); });
I lembe maeni, ju ma gisomo lembe mi ngec giparu pi loko pa kemikol pa carbon dioxide ni piny ma pire tek calu methanol man formic acid (HCOOH). Mi yubu piny ma tok cen, piny ma nyayu hydride ions (H-), ma rom ku proton acel man electrons aryo, mitere. Ku lapor, reduction-oxidation pair pa nicotinamide adenine dinucleotide (NAD+/NADH) utiye piny ma nyayu man gwoko hydride (H-) i piny ma kwo.
I kum lembe eni, dul pa ju ma timo sayusac ma telo wigi ku Professor Hitoshi Tamiaki kud i Ritsumeikan University, Japan, gi goyu yore manyen mi kemikol ma tiyo ku ruthenium-like NAD+/NADH complexes mi dwoko piny CO2 ni HCOOH. Adwogi pa somo migi juwodho i gazeti mi ChemSusChem in nindo 13, dwi mir acel, 2023.
Japonji Tamiaki onyutho the lembe ma umitu etim sayusac pare. “Junyutho kawoni nia ruthenium complex ku NAD+ model, [Ru(bpy)2(pbn)](PF6)2, ubekadhu kud i photochemical two-electron reduction. Egam eketho NADH type complex [Ru (bpy) )2 (pbnHH)](PF6)2 bedo nuti pa trinolatoletole (CH3CN) ithe lero ma nen,” ewacu.
"Mi medo, loko CO2 i [Ru(bpy)2(pbnHH)]2+ solution dwoko [Ru(bpy)2(pbn)]2+ man ewodho formate ions (HCOO-). Ento, ngwec pare utiye piny. Manok. Pieno, loko H- ni CO2 mitu cataly system maber."
Pieno, ju ma timo sayusac gi lubo tok reagents matung tung man kite ma gi tiyo kudu ma konyo ni jwigo yamo ma rac ma julwongo ni carbon dioxide. Malube ku lembe maeni, giparu nya ler ma nyayu dwoko piny pa redox pair [Ru(bpy)2(pbn)]2+/[Ru(bpy)2(pbnHH)]2+ i bedo pa 1, 3-. Dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole (BIH). Mi medo, pii (H2O) in CH3CN kakare pa triethanolamine umedire ku dongo.

Mi medo, ju ma timo sayusac gi lubo tok lembe ma copo timere ni tiyo ku yore macalo nuclear magnetic resonance, cyclic voltammetry man UV-visible spectrophotometry. Malube ku lembe eni, giparu: Mir acel, ikum photoexcitation pa [Ru(bpy)2(pbn)]2+, free radical [RuIII(bpy)2(pbn•-)]2+* juyubu, ma timo reduction ma e: BIH Get [RuII(bpy)2(pbn)-2+++++. I ngeye, H2O protonates ruthenium complex mi yubu [Ru(bpy)2(pbnH•)]2+ man BI•. Piny ma wok kud i iye jupoko ni bedo [Ru(bpy)2(pbnHH)]2+ man edwogo ni [Ru(bpy)2(pbn)]2+. Ma kwong eca judwoko piny ku BI• ni kelo [Ru(bpy)(bpy•−)(pbnHH)]+. Dul eni ubedo piny ma loko H- ni CO2, ma nyayu HCOO- man formic acid.
Ju ma timo sayusac unyutho nia timo ma juyero utiye ku wel ma malu mi loko (wel pa mole pa carbon dioxide ma juloko ku mole acel pa catalyst) – 63.
Ju ma timo sayusac gibedo kud anyonga lee dit pi lembe ma ginwangu man gitiye ku gen mi yubu yore manyen mi loko tego (ler pa ceng ni tego pa kemikol) mi yubu piny manyen ma copo dwoko piny ma nyen.
"Yore mwa bi dwoko piny wel pa carbon dioxide iwi ngom man bikonyo ni gwoko rwom pa yamo. Pieno, ecopu dwoko piny lyethu pa wi ngom i anyim," Japonji Tamiaki umedo. "Mi medo, diro manyen mi tero hydride ma kwo bi mio iwa jam piny ma pire tek."
Lembe mukende: Yusuke Kinoshita et al., Light-induced organic hydride transfer to CO2** mediated by ruthenium complexes as models for NAD+/NADH redox couples, ChemSusChem (2023). DOI: 10.1002/cssc.202300032

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