He thuziak hi Science X-in editorial kalphung leh policy a siam angin kan thlirlet a ni. Editor-te chuan thupui dik tak a nih theih nan a hnuaia miziate hi an ngaih pawimawh hle a ni:
Climate change hi khawvel pum huap environment lama harsatna lian tak a ni. Climate change thlentu ber chu fossil fuel hal lutuk hi a ni. Khawvel lumna tipungtu, greenhouse gas carbon dioxide (CO2) an siam chhuak a ni. Chumi avang chuan khawvel hmun hrang hranga sorkarte chuan hetiang carbon emission tihtlem dan tur policy an siam mek a ni. Mahse, carbon emission tihtlem mai mai chu a tawk lo mai thei. Carbon dioxide emission pawh hi control a ngai a ni. A rilru a hah lutuk chuan a rilru a buai em em a, a rilru a hah lutuk chuan a rilru a buai em em bawk a. googletag.cmd.push(function() { googletag.display('div-gpt-ad-1449240174198-2′); });
Hemi chungchangah hian scientist-te chuan carbon dioxide chu chemical hmanga value-added compound methanol leh formic acid (HCOOH)-a chantir an rawt a ni. Hemi hnuhnung zawk siam tur hian proton pakhat leh electron pahnih tlukpui hydride ion (H-) awmna hmun a ngai a ni. Entirnan, nicotinamide adenine dinucleotide (NAD+/NADH) reduction-oxidation pair hi biological system-a hydride (H-) siamtu leh dahkhawmna a ni.
Hemi hnuaiah hian Ritsumeikan University, Japan atanga Professor Hitoshi Tamiaki kaihhruai researcher team chuan ruthenium ang chi NAD+/NADH complex hmangin CO2 chu HCOOH-ah tihtlem nan chemical method thar an siam a. An zirchianna result hi January 13, 2023 khan journal ChemSusChem-ah tihchhuah a ni.
Professor Tamiaki chuan a zirchianna chhan chu a sawifiah a. “Tun hnaiah NAD+ model, [Ru(bpy)2(pbn)](PF6)2 nei ruthenium complex chu photochemical two-electron reduction a tawk tih hmuhchhuah a ni a, acetonitrile (CH3CN)-a triethanolamine awmnaah a inmil NADH type complex [Ru (bpy) )2 (pbnHH)](PF6)2 chu hmuh theih êng hnuaiah a lo piang ta a ni,” a ti a.
“Chu bakah hian CO2 chu [Ru(bpy)2(pbnHH)]2+ solution-a bubbling hian [Ru(bpy)2(pbn)]2+ a siam thar leh a, formate ion (HCOO-) a siam chhuak a ni. Mahse, a siam chhuah chakna chu a hniam hle. A tawi hle. Chuvangin H- chu CO2-a chantir tur chuan catalytic system tha zawk a ngai a ni.”.
Chuvangin, zirchiangtute chuan carbon dioxide emission tihtlem nana pui thei reagent hrang hrang leh reaction condition hrang hrang an zirchiang a. Heng experiment an neih atang hian redox pair [Ru(bpy)2(pbn)]2+/[Ru(bpy)2(pbnHH)]2+ chu 1, 3- awmnaah light-induced two-electron reduction an rawt a ni. Dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole (BIH) hmanga siam a ni. Tin, triethanolamine aiah CH3CN-a tui (H2O) chuan a rah a ti tha zual hle bawk.

Hei bakah hian zirchiangtute hian nuclear magnetic resonance, cyclic voltammetry leh UV-visible spectrophotometry te hmangin reaction mechanism awm thei te pawh an zirchiang bawk. Chumi atanga chhut chuan heti hian an hypothesis an siam a: Pakhatnaah chuan [Ru(bpy)2(pbn)]2+ photoexcitation a nih chuan free radical [RuIII(bpy)2(pbn•-)]2+* a lo piang a, chu chuan a hnuaia reduction hi a tawk a ni: BIH Get [RuII(bpy)2(pbn•-)]2+ leh BIH•+. Chumi hnuah chuan H2O chuan ruthenium complex chu protonate in [Ru(bpy)2(pbnH•)]2+ leh BI• a siam ta a ni. Chuta chhuak product chu disproportionated a ni a, [Ru(bpy)2(pbnHH)]2+ a lo piang a, [Ru(bpy)2(pbn)]2+ ah a kir leh ta a ni. Chumi hnuah chuan a hmasa zawk chu BI• hmangin tihtlem a ni a, [Ru(bpy)(bpy•−)(pbnHH)]+ a siam chhuak ta a ni. He complex hi active catalyst a ni a, H- chu CO2 ah a chantir a, HCOO- leh formic acid a siam chhuak thin.
Hrilhfiahtute chuan he reaction ruahman hian conversion number sang tak (catalyst mole khatin carbon dioxide mole a thlak zat) – 63 a nei tih an hmuchhuak.
Heng thil hmuhchhuah te hi zirchiangtute hian an phur hle a, renewable material thar siamna atana energy (ni eng chu chemical energy-a chantir) dan thar siam chhuah an beisei.
“Kan hmanraw hian khawvela carbon dioxide awm zawng zawng a tihtlem bakah carbon cycle vawng nung turin a pui bawk ang. Chuvangin nakin lawka khawvel lumna tur a tihziaawm thei a ni,” tiin Professor Tamiaki chuan a sawi belh bawk. “Chu bakah hian organic hydride transport technology thar te hian compound hlu tak tak min pe dawn a ni.”
Thu belhchian dawl zawk: Yusuke Kinoshita leh a thawhpuiten, NAD+/NADH redox couple-te model atan ruthenium complex-in CO2**-a light-induced organic hydride transfer, ChemSusChem (2023). A rilru a hah lutuk chuan a rilru a buai em em a. 10.1002/cssc.202300032

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