Kua arotakehia tēnei tuhinga i runga anō i ngā tikanga me ngā kaupapa here ētita a Science X. Kua whakanuia e ngā ētita ngā āhuatanga e whai ake nei, me te whakarite anō hoki i te pono o ngā ihirangi:
He raruraru taiao ā-ao te huringa āhuarangi. Ko te tino take o te huringa āhuarangi ko te tahunga nui o ngā wahie pūmua. Ka whakaputahia e rātou te hauhā waro (CO2), he hau kati kōtuhi e whai wāhi ana ki te whakamahana o te ao. I runga i tēnei, kei te whakawhanake ngā kāwanatanga o te ao i ngā kaupapa here hei whakawhāiti i aua tukunga waro. Heoi, kāore pea e ranea te whakaiti noa i ngā tukunga waro. Me whakahaere hoki ngā tukunga hauhā waro. googletag.cmd.push(function() { googletag.display('div-gpt-ad-1449240174198-2′); });
I tēnei whakaaro, e whakaaro ana ngā kaipūtaiao ki te hurihanga matū o te hauhā waro ki ngā matū whai uara pērā i te methanol me te waikawa formic (HCOOH). Hei whakaputa i tēnei, me whai pūtake o ngā katote hydride (H-), e ōrite ana ki te kotahi pūtorino me ngā irahiko e rua. Hei tauira, ko te takirua whakaiti-waikura o te nicotinamide adenine dinucleotide (NAD+/NADH) he kaihanga me te puna o te hydride (H-) i roto i ngā pūnaha koiora.
I runga i tēnei horopaki, i whakawhanakehia e tētahi rōpū kairangahau i arahina e Ahorangi Hitoshi Tamiaki o Te Whare Wānanga o Ritsumeikan, Hapani, tētahi tikanga matū hou mā te whakamahi i ngā matatini NAD+/NADH rite ki te ruthenium hei whakaiti i te CO2 ki te HCOOH. I whakaputaina ngā hua o tā rātou rangahau ki te puka ChemSusChem i te 13 o Hānuere, 2023.
E whakamārama ana a Ahorangi Tamiaki i te hihiri o tana rangahau. "I whakaaturia tata nei ko te matatini ruthenium me te tauira NAD+, [Ru(bpy)2(pbn)](PF6)2, ka pāngia e te whakaiti irahiko-rua whakaahua. Nā tēnei i puta ai te matatini momo NADH e rite ana [Ru (bpy) )2 (pbnHH)](PF6)2 i te aroaro o te triethanolamine i roto i te acetonitrile (CH3CN) i raro i te mārama e kitea ana," tana kī.
"Hei tāpiritanga, ko te pupuhi o te CO2 ki roto i te otinga [Ru(bpy)2(pbnHH)]2+ ka whakaora anō i te [Ru(bpy)2(pbn)]2+ ka puta he iona formate (HCOO-). Heoi, he tino iti te tere o te whakaputa. He poto noa iho. Nō reira, me whakapai ake te pūnaha whakaterenga mō te huri i te H- ki te CO2."
Nō reira, kua rangahauhia e ngā kairangahau ngā momo matū me ngā āhuatanga tauhohenga e āwhina ana ki te whakaiti i ngā tukunga hauhā waro. I runga i ēnei whakamātautau, i whakaarohia e rātou te whakaiti i ngā irahiko-rua i puta mai i te mārama o te takirua redox [Ru(bpy)2(pbn)]2+/[Ru(bpy)2(pbnHH)]2+ i te aroaro o te 1, 3-. Dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole (BIH). Hei tāpiri, ko te wai (H2O) i roto i te CH3CN hei utu mō te triethanolamine i whakapai ake i te hua.

Hei tāpiritanga, i tirotirohia hoki e ngā kairangahau ngā tikanga tauhohenga pea mā te whakamahi i ngā tikanga pēnei i te aukume aukume karihi, te voltammetry hurihuri me te spectrophotometry kitea-UV. I runga i tēnei, i whakapaehia e rātou: Tuatahi, i te whakakorikori whakaahua o [Ru(bpy)2(pbn)]2+, ka hangaia te rauropi kore utu [RuIII(bpy)2(pbn•-)]2+*, ka pāngia e te whakaiti e whai ake nei: BIH Whiwhi [RuII(bpy)2(pbn•-)]2+ me BIH•+. Muri iho, ka whakaporonetia e te H2O te matatini ruthenium hei hanga i te [Ru(bpy)2(pbnH•)]2+ me te BI•. Ka taurite te hua ka puta hei hanga i te [Ru(bpy)2(pbnHH)]2+ ka hoki ki te [Ru(bpy)2(pbn)]2+. Kātahi ka whakaitihia te mea o mua e BI• hei whakaputa i te [Ru(bpy)(bpy•−)(pbnHH)]+. He whakakorikori hohe tēnei matatini e huri ana i te H- ki te CO2, ka puta ai te HCOO- me te waikawa formic.
I whakaatuhia e ngā kairangahau he teitei te tau tahuritanga o te tauhohenga kua whakaarohia (te maha o ngā ira o te hauhā waro i tahurihia e te ira kotahi o te whakakorikori) - 63.
E harikoa ana ngā kairangahau ki ēnei kitenga, ā, e tumanako ana rātou ki te whakawhanake i tētahi tikanga hou mō te huri i te pūngao (te hihi o te rā hei pūngao matū) hei whakaputa rauemi hou ka taea te whakahou.
"Ka whakaitihia hoki e tā mātou tikanga te nui katoa o te hauhā waro i runga i te Ao, ā, ka āwhina i te pupuri i te huringa waro. Nō reira, ka taea te whakaiti i te mahana o te ao ā muri ake nei," te tāpiri a Ahorangi Tamiaki. "Hei tāpiri, mā ngā hangarau kawe waikura waro hou e whakarato mai ki a tātou ngā matū tino nui."
Ētahi atu kōrero: Yusuke Kinoshita et al., Te whakawhiti i te waiora waiora i puta mai i te mārama ki te CO2** i tukuna e ngā matatini ruthenium hei tauira mō ngā takirua redox NAD+/NADH, ChemSusChem (2023). DOI: 10.1002/cssc.202300032

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