Chinyorwa chino chakaongororwa zvichienderana nemaitiro eScience X ekunyora uye mitemo. Vanyori vakasimbisa zvinhu zvinotevera uku vachiona kuti zvirimo ndezvechokwadi:
Kuchinja kwemamiriro ekunze idambudziko rezvakatipoteredza pasi rose. Chinhu chikuru chinokonzera shanduko yemamiriro ekunze kupisa zvakanyanya mafuta efossil. Anogadzira kabhoni dhayokisaidhi (CO2), gasi rinopisa pasi rose rinokonzera kupisa kwepasi rose. Nekuda kweizvi, hurumende pasi rose dziri kugadzira maitiro ekuderedza kuburitswa kwekabhoni kwakadaro. Zvisinei, kungoderedza kuburitswa kwekabhoni kungasave kwakakwana. Kuburitswa kwekabhoni dhayokisaidhi kunofanirawo kudzorwa. googletag.cmd.push(function() { googletag.display('div-gpt-ad-1449240174198-2′); });
Panyaya iyi, masayendisiti anokurudzira kushandurwa kwemakemikari kwecarbon dioxide kuita zvinhu zvinowedzera kukosha zvakaita semethanol neformic acid (HCOOH). Kuti pagadzirwe iyi yekupedzisira, panodiwa ma hydride ions (H-), ayo akaenzana neproton imwe chete nemaerekitironi maviri. Semuenzaniso, nicotinamide adenine dinucleotide (NAD+/NADH) ijenareta uye dura rehydride (H-) mumasisitimu ehupenyu.
Zvichienderana neizvi, chikwata chevaongorori chaitungamirwa naPurofesa Hitoshi Tamiaki wekuRitsumeikan University, Japan, chakagadzira nzira itsva yemakemikari vachishandisa ruthenium-like NAD+/NADH complexes kuderedza CO2 kuita HCOOH. Mhedzisiro yekudzidza kwavo yakaburitswa mujenari reChemSusChem musi wa13 Ndira, 2023.
Purofesa Tamiaki anotsanangura chikonzero chekutsvagurudza kwake. "Zvakaratidzwa nguva pfupi yadarika kuti ruthenium complex ine NAD+ model, [Ru(bpy)2(pbn)](PF6)2, inoderedzwa ne photochemical two-electron. Izvi zvakaita kuti pave neNADH type complex inoenderana [Ru (bpy) )2 (pbnHH)](PF6)2 kana paine triethanolamine muacetonitrile (CH3CN) pasi pechiedza chinoonekwa," akadaro.
"Pamusoro pezvo, kudira CO2 mu [Ru(bpy)2(pbnHH)]2+ mhinduro kunovandudza [Ru(bpy)2(pbn)]2+ uye kunoburitsa ma ions eformate (HCOO-). Zvisinei, kumhanya kwayo kugadzira kwakaderera. Kupfupika. Saka, kushandura H- kuita CO2 kunoda sisitimu ye catalytic yakagadziriswa."
Saka, vaongorori vakaongorora ma reagents akasiyana-siyana uye mamiriro ekuita anobatsira kuderedza kuburitswa kwecarbon dioxide. Zvichibva pakuedza uku, vakakurudzira kudzikiswa kwemaerekitironi maviri anokonzerwa nechiedza pa redox pair [Ru(bpy)2(pbn)]2+/[Ru(bpy)2(pbnHH)]2+ pamberi pe1, 3-. Dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole (BIH). Pamusoro pezvo, mvura (H2O) iri muCH3CN pachinzvimbo chetriethanolamine yakawedzera kuvandudza goho.

Pamusoro pezvo, vaongorori vakaongororawo nzira dzinogona kushandiswa nemaitiro ekuita zvinhu vachishandisa nzira dzakadai senuclear magnetic resonance, cyclic voltammetry uye UV-visible spectrophotometry. Zvichibva pane izvi, vakafungidzira kuti: Kutanga, kana [Ru(bpy)2(pbn)]2+ yatorwa ne photoexcitation, free radical [RuIII(bpy)2(pbn•-)]2+* inoumbwa, iyo inoderedzwa zvinotevera: BIH Get [RuII(bpy)2(pbn•-)]2+ uye BIH•+. Zvadaro, H2O inoburitsa ruthenium complex kuti iumbe [Ru(bpy)2(pbnH•)]2+ uye BI•. Chigadzirwa chinobuda chinopatsanurwa kuita [Ru(bpy)2(pbnHH)]2+ uye chinodzokera ku [Ru(bpy)2(pbnHH)]2+. Yekutanga inoderedzwa neBI• kuti iumbe [Ru(bpy)(bpy•−)(pbnHH)]+. Iyi complex chinhu chinoshanda chinoshandura H- kuita CO2, zvichigadzira HCOO- uye formic acid.
Vaongorori vakaratidza kuti mhinduro iyi ine nhamba yakakura yekuchinja (nhamba yemamoles ecarbon dioxide anoshandurwa nemoles imwe chete yecatalyst) - 63.
Vaongorori vanofara nezvakawanikwa izvi uye vanotarisira kugadzira nzira itsva yekushandura simba (chiedza chezuva kuita simba remakemikari) kuti vagadzire zvinhu zvitsva zvinogona kushandiswazve.
"Nzira yedu ichaderedzawo huwandu hwese hwecarbon dioxide paNyika uye ichabatsira kuchengetedza kutenderera kwecarbon. Nokudaro, inogona kuderedza kudziya kwepasi rose mune ramangwana," Purofesa Tamiaki akawedzera. "Pamusoro pezvo, matekinoroji matsva ekufambisa hydride achatipa mishonga inokosha."
Rumwe ruzivo: Yusuke Kinoshita et al., Kuendeswa kwemvura inoyerera kubva muchiedza kuenda kuCO2** kwakaitwa neruthenium complexes semamodeli eNAD+/NADH redox couples, ChemSusChem (2023). DOI: 10.1002/cssc.202300032

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