Dr. R. Lalrempuia leh a thawhpuite, tuna School of Chemistry and Chemical Biology, University College Dublin Belfield, Dublin 4 (Ireland) a Post-Doctoral ti mek chuan a research tih mek ah hlawhtlinna ropui tak chang in tui (H2O) chu a phel darh a. He a thil hmuh chhuah hi khawvela original research paper pubish theihna tha ber (Chemistry bikah) Angewante Chemie (impact factor hi 12 vel a ni) ah an chhuah a ni.
Dr R. Lalrempuia hian North Eastern Hill University (NEHU) atangin PhD tha takin a zo a. Doctorate dergree nei tura a beih chhung hian international journal ah paper pawh 15 vel lai a publish hman a ni. PhD a zawh hnu hian Spain (Zaragoza) ah Post Doc hi a ti phawt a, hetah pawh hian paper tha tak tak a publish nghe nghe. Spain a Post Doc a tih zawh hnu in Ireland ah Post Doc ti turin a kal leh a, a thawhrimna leh a tumruhna avangin he hlawhtlinna ropui tak hi a chang ta a ni.
Tui phel darh chu eng nge a that na:
Mizo pa, thingtlang kilkhawr ber a awm pawn tui pawimawh zia chu an hai hauh lovang le. Mihring nunna hnar ber te zing ami a ni ti pawh kan hria ang. Tunlai khawvel ah phei chuan a pawimawhna a zual tial tial emaw tih mai tur a ni. Tui hi hydrogen pahnih leh oxygen atom pakhat in an siam a ni a. Thil nungte tana Oxygen pawimawhzia chu kan hre awm e. Hydrogen pawh hi energy source tha ber a ni kan ti thei ang (Hydrogen bomb chak zia atangin kan ngaihruat thiam awm e, atom bomb hi a kep a ni). Tunlai khawvela Chemist ropui tak tak ten an thil tih tum ber pawh tui phel darh a, hydrogen lak chhuah hi a ni reng a.
Tui phel darh hi method chi khat electrolysis an tih hmangin a tih theih a, mahse a energy hman hi energy a pekchhuah aia a tam zawk avangin energy source atan chuan hman tlak a ni lo. Chuvang chuan, room temperature ah, catalyst (chemical reaction tichak nan emaw, a chak lutuk tur timuangtu) man to lutuk lo hmang a tui phel darh hi mithiam te inelna ber pakhat a ni a. Chung mithiam tak takte zingah Mizo tlangval a tel hi a ropui in a chhuanawm tak zet zet a ni. A catalyst hman hi Iridium complexes a ni a, an hmuhchhuah tawh zingah chuan active ber a ni nghe nghe.
An paper publish phek khatna lek kan tarlang ang e:
Water Oxidation Catalyzed by Strong Carbene-Type Donor-Ligand Complexes of Iridium**
Ralte Lalrempuia, Neal D. McDaniel, Helge Muller-Bunz, Stefan Bernhard,* and
Martin Albrecht*
In memory of Fiona O’Reilly
Production of energy from renewable sources has recently become a pressing challenge in energy-related research.[1] The splitting of water into oxygen and hydrogen, inspired by nature’s use of water and sunlight as environmentally abundant feedstocks, constitutes a particularly attractive approach towards addressing this issue. In nature, photosynthetic water fixation and splitting is a delicately balanced process, overcoming the energetic barrier of O-H bond cleavage and O-O bond formation by a stunning reaction cascade.[2] The complexity of the photosynthetic machinery requires alternative approaches for artificial photosynthesis,[3] especially for the water-oxidation sequence.[4] High redoxflexibility of the active center constitutes a key element in the design of synthetic complexes for water oxidation, since the formation of O2 from H2O requires the transfer of four electrons. Apart from a number of heterogeneous systems,[5] ruthenium complexes, suggested to be oxidizes from RuII to RuVI have been successfully developed for the catalytic splitting of water.[6] Ruthenium centers in bi- and tetrametallic complexes were thought to work synergistically and hence require only oxidation to RuIV and RuIII, respectively, to provide the four electrons for O2 generation.[7] Complementary to these approaches, bis(cyclometalated) iridium(III) complexes[8] and cobalt-based tetrametallic systems[9] were shown to be active in water oxidation. The photochemical properties of these complexes allowed light to be employed to induce charge separation and subsequent water oxidation, thus mimicking the photosynthetic system very closely. Most recently, cyclometalated iridium(III) cyclopentadienyl complexes were shown to exhibit excellent activity in electrochemically induced water oxidation.[10]
Owing to the multistep redox processes involved in water oxidation, we considered abnormally bound N-heterocyclic carbenes to be advantageous spectator ligands. Abnormal carbenes, that is, formally neutral carbenes that lack a neutral resonance structure, have large contributions from zwitterionic resonance forms,[11] which may assist in stabilizing different metal oxidation states when coordinated to an appropriate transition metal. In addition, the ligands may serve as a transient reservoir of both positive and negative charge, thus providing synergistic effects similar to those observed in bi- and multimetallic complexes.[7] Based on these rationales, combined with the synthetic versatility of triazoles as potential carbene precursors,[12] we concentrated our initial efforts on the metalation of pyridinium-functionalized triazolium salt 1 (Scheme 1). This salt is readily available through copper-catalyzed [2+3] cycloaddition (“click chemistry”)[13] starting from commercially available 2-ethynylpyridine and benzylazide generated from NaN3 and BnBr, and subsequent methylation with MeOTf (OTf=trifluoromethylsulfonate). Metalation with [{Cp*IrCl2}2] (Cp*=C5Me5) induced double C-H bond activation to give the C,C-bidentate complexes 2 and 3 (Scheme 1).[14] Complex 2 comprises two different abnormally bound N-heterocyclic carbene ligands, that is, a triazolylidene and a 3-pyridylidene, while complex 3 features a rare[15] ylide bonding mode of the pyridinium ligand precursor, along with the abnormal triazolylidene. Complex 2 could be separated from the reaction mixture by virtue of its insolubility in CH2Cl2. The CH2Cl2-soluble fraction comprised several species containing a Cp*Ir fragment, as evidenced by the various singlets in the 1H NMR spectrum around d=1.9 ppm. Upon heating this mixture under vacuum, complex 3 formed in moderate yield. Notably, complex 2 did not undergo a thermally induced isomerization
to yield complex 3 under identical conditions, but instead decomposed. Hence the pyridylidene bonding mode in 2 is not an intermediate on the route to the ylide complex 3. More likely, complexes 2 and 3 share a common, monodentate triazolylidene iridium intermediate, which may then undergo C(sp2)-H or C(sp3)-H bond activation and cyclometalation.[16]
Hriat belh duh tan hetah hian a en theih e:
https://onlinelibrary.wiley.com/doi/10.1002/anie.201005260/abstract
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- La thlir duh an awm takin.
ka hre chhuak ziah …nawm hmel khawp mai…catalania ami a awm
…thik angin ka lang vel ang a he he hi hi
ava har tak… kei chu ka failed...
January 22nd, 2011 at 10:33 am
Va chhuanawm ve le aw….
Keinin Tui te chu kan in thei hram a nia… lo pheldarh vel chu ropui hle mai, ngaihsanawm e.
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January 22nd, 2011 at 10:37 am
Chhuanawm hle mai.
Hriatthiam thu-ah erawh ka hrethiam chiah lo!
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January 22nd, 2011 at 10:39 am
Ka va chhuang tak ve. Duhsakna leh Lawmpuina ka hlan e.
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January 22nd, 2011 at 10:44 am
A chhuanawm hle mai. Ka lawmpui bawk.
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January 22nd, 2011 at 10:46 am
A tangkai viau phei chuan tlawm bik takin an phel darh thei dawn a nih chu.
A hmanna tur lam hrethiam ve vak lo mahila a chhuan awm reng reng e.
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January 22nd, 2011 at 10:50 am
@alchemist, i ke a mawi khawp mai,i thil rawn post hi chanchintha a ni.chanchintha puangtute ke chu a mawi tih a ni lawm ni, kan thurin bu ah khan?.He tiang chanchin hi a lawm a hria chuan puang tam teh ang u.NLUP,Eiru,Pawngsual,Inthat,Ruling an dik, diklo etc.vel hi chu chanchin chhia a ni
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January 22nd, 2011 at 11:05 am
A va ti tha ve, a lawmpui awm hle mai.
Dr. Lalrempuia Ralte hi Pastor fapa, St Pauls 89 batch ami kha a ni em o? High School ah kan thut dun thin lai pawh khan Science kha chu a ti hlei thei thin khawp mai kha chu a nia.
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January 22nd, 2011 at 11:05 am
Misual dot com member hi turu tak2 in van tam ta vele, a ropui in ka chhuang che u.
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January 22nd, 2011 at 11:07 am
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January 22nd, 2011 at 11:10 am
va ropui riap riap ve…. chhuanawm hle mai
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January 22nd, 2011 at 11:16 am
Congrats Dr. Lalrempuia Ralte! ka chhuang hle mai che!
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January 22nd, 2011 at 11:25 am
@ #7 : A ni e.
He pa hi keipawhin a mimalin ka hria, ka ngaisang khawp mai.
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January 22nd, 2011 at 11:34 am
Khawi veng nge anih aw, ka va ngaisang e. Mizote hi Ziak leh chhiar thiam tam, lehkha thiam tak tak tlem em em si kan ni a, hetih laia hetiang mithiam tak tak kan han nei leh nawlh thin hi ava lawmawm em.
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January 22nd, 2011 at 11:35 am
Hetiang bak hi phel thiam ka nei tamlo khawp mai
https://img42.imageshack.us/img.....913642.jpg
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January 22nd, 2011 at 11:39 am
Mosia anga tuipui sen phel darh turah ka lo ngai ringawt a , a topic han chhiar liam puat chuan…
Kan scholar pa chu
Philipines ah pawh khuan electric current (tlemte) nena tui phel darh ka hria (differently from others of same technique)…mitsubishi nen research an ti mek..
@ 14 HV…ha ha ha tuna tan chuan i thil thiam khi a tangkai zawk he he he
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January 22nd, 2011 at 11:48 am
iau iau iau
Aman ava comment ve duhlo ve
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January 22nd, 2011 at 11:53 am
Tui in lo phel darh zel ten in tur kan nei nang
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January 22nd, 2011 at 12:03 pm
Chu pa chu a va chhuanawm kher ve le! Mizo nih a tinuam ngawt mai. A research tih leh zelna atan duhsakna sang ber ralkhat atangin ka hlan e.
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January 22nd, 2011 at 12:03 pm
zualbon, keini hi chuan thil raw tak2 thiahdarh/thiahdarh bak kan thiam ve lo e
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January 22nd, 2011 at 12:06 pm
Hetiang hi kan Idol ni se a tha zirlai te pawhin.
Tuktin par ang maia reilo te rawn par a chuai leh mai thin te lo Idolize vak vak ringawt lovin.
Hman deuha 11.9(5?) a an accept kha ani tak ang a.
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January 22nd, 2011 at 12:11 pm
funny-a pawh hian a aia turu zawkin tui phel sa oxygen part lai tak hi a la phel darh ve ngei ang…a phel darh ve hunah chuan william funny tih a hriat ani tawh ang
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January 22nd, 2011 at 12:13 pm
lrpa chu han varno pui ka van chak ve mawle hairehai
zualbon, funny chuan Mizoram eiru ho a phelhdarh/thiat dawn
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January 22nd, 2011 at 12:20 pm
zualbonez: Stockholm ah eng pheikhawk nge ka bun ang tih ah hian kala buai deuh hlek a
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January 22nd, 2011 at 12:29 pm
funny….buai duh suh…’Cannes’ a ka bun hnu ka hawh tir dawn che ania
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January 22nd, 2011 at 12:31 pm
Dr Rempuia chu a van che thra pup pup ve. Congrats!
. Amah hi ka hmelhriat a ni ve kheuh.
Funny-an oxygen a phel darh hunah chuan, CO2 hlir kan thawlut tawh ang…nuam ngawt ang! lol
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January 22nd, 2011 at 12:44 pm
A va ropui mai mai em!! Mizo ka ni hi vannei ka inti nawn fo thin…a tangkaina erawh ka hre tam lo mahse a chhuanawm lutuk a ni
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January 22nd, 2011 at 12:58 pm
bmw rempuia te nen hian in in classmate/batchmate thin em? ST Pauls, NEHU ah?
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January 22nd, 2011 at 1:03 pm
A bei fan fan anga Mosia angin Lui tui pawh a la phel darh chuai mai ang a!
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January 22nd, 2011 at 1:04 pm
aduh, classmate lova mahse same age group. Zirna lampang atanga hria ka ni tlat lo. Cl 10 pass kum a inang vel ang…give or take 1-2 yrs.
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January 22nd, 2011 at 1:08 pm
ok lo zawt mai mai che nih kha
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January 22nd, 2011 at 1:10 pm
zualbonez #24: anih chuan ka Nobel lecture ah zawite in i hming kalo lam ri ve dawnnia
Hmanah misualah hemi paper an accept thu hi code deuhin min rawn hrilhru a. Khatih lai khan in hre ve der silo. In ngaihsan hma daih khan ka ngaisang tawh. ehh (insawitheih ve dan chu. lolz)
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January 22nd, 2011 at 1:12 pm
HVa pawhin Vawk a phel darh thei tih ka rilruah a rawn lang a. Ka chhiar thla zel a…
komen 14 link ka’n keu hawng chiah chu! ka nui chhuak huk mai.
Tute emaw inzaisiak big screen a en aichuan, an tui phel darh lai hi ka en chak! Ka chhuang, ka ngaisang, ka fak, ka lawmpui e
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January 22nd, 2011 at 1:20 pm
@ 31…funny….ngatinge tui molecule aia te zawk atom phel thiam chuan i ngaihsang ve ringawt a he he he
hairehai
mizo pa bai a chingal catalyst thlak thin tan chuan tui phel chu har vak lo ani mau :fiamthu:
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January 22nd, 2011 at 1:32 pm
kei chu tuihi ka lem zawt zawt thei, phel tet ngai lo in
A titha hle mai, a post tu pa pawh hi pui ve tak ani!
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January 22nd, 2011 at 1:35 pm
A va ngaihsanawm ve. Mizo mi chhuanawm kanneih belh leh ta a nih hi. Tu tih dan takah maw….”I batna ten zu man min thing engtinnge kan tih tak ang” ti a nupui ten mipa te nikhua lohzia min hrilh laia hetiang mi chhuanawm anlo awm leh thin hi chu hmasawnna ropui tak a ni
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January 22nd, 2011 at 1:41 pm
Pu funny, nang aiin ka ngaisang hmasa aw.
A paper published khi han chhiar kan tum ngial a, ka chhiarchhuak talo mai, ka bo lutuk a.
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January 22nd, 2011 at 1:55 pm
drake Says:
kei chu tuihi ka lem zawt zawt thei, phel tet ngai lo in
lolsss. hetiang one-liner nuih100thlak te te vang hian lawm misual.com ka uar em em nachhan chu!! Frost-a hian a hnehsawh zek bawk
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January 22nd, 2011 at 1:57 pm
Pu Alchemista hi hetiang lam ilo post thin a i ti tha thin khawp mai. A lawmpui awm e. A thawhrim na leh taihmakna Pathianin mal a sawm a ni. Han tang zel teh se. Paper publish zel tura tan khawh turin ka full support e.
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January 22nd, 2011 at 1:59 pm
HV-a thil phel khi kei chu tuisik ai chuan ka duh zawk daih mai, thiante u…..
Tak tak ana, a chhuanawm khawp mai, eng ang taka pawimawh nge anih ka hrethiam pha lo….achievement ropui tak, international level a a nei khi a ropui…ron ‘misual’ve thin sela chuan ‘mizo identity’ tih velah kan hnialpui leh mai2 awm si a….hairehai
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January 22nd, 2011 at 1:59 pm
Ka Ralte pui a nih vang poh nilovin ka ngaisang ve hrim hrim.Ka mawl na avang a.A thiam na ka hriat thiam pui loh erawh hi chu a poi ka ti
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January 22nd, 2011 at 2:18 pm
@40 jalal, Ralte theuh theuh thiam zawng a inang lo ani maw?
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January 22nd, 2011 at 2:34 pm
@BMW Dr. Lalrempuia Ralte hi kum engtia upa nge?
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January 22nd, 2011 at 2:36 pm
@ drake…bmw ka lo chhan sak lawks…: BMW te rual anih chuan 22-23 vel anih ka ring
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January 22nd, 2011 at 2:41 pm
@drake ka lo chhan sak ve ange — ka hriat kha a nih chuan 36, 37 vel ani tawh ang
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January 22nd, 2011 at 2:45 pm
36-37 kum hmmmm bmw rual kum 22-23 velah ka lo ngai a ….funny te anga zei anih chuan zaragoza ah spanish chhas 5 vel heartbreak lutukin a kalsan anga chuan dublin ah a 4 na vel a bem thlu leh mek ang NOI :fiamthu:
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January 22nd, 2011 at 2:50 pm
ZB, zaragoza ah chuan ka kal tawh ngei…kan pu ten trade show chhim turin min tir tawh. Mahse keini te chuan hna leh shopping bak kan ngaihtuah peih lo!
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January 22nd, 2011 at 2:52 pm
nupui anei tawh em @aduhi, zualbonez hian a sitaar tlat in ka hria, a kum te a lo sawi tha duh lo vel ;-P
BMW chu chemistry tak a chhut chuan 35-39 vel lek ni mauh
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January 22nd, 2011 at 2:53 pm
Nep thlerh thlerh em mai a hetiang te chu..tui atang a hydrogen lak hran pawh ni hlei lo..
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January 22nd, 2011 at 2:54 pm
@drake. ka kum hi chhut² teh suh u!! in ninawm lutukssss lol
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January 22nd, 2011 at 2:55 pm
dik chiah bmw! never ask a woman her age, and a man his salary an tih kha.
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