Hypophosphorous acid(H3PO2) yog ib qho yooj yim inorganic phosphorus compound siv dav hauv kev sib txawv rau nws cov khoom tshwj xeeb. Nrog rau cov ntawv thov kev sib kis ntawm cov koom haum hluavtaws, electroplating, kev kho dej, thiab tshuaj, qhov kev sib xyaw no suav tias yog ib qho tseem ceeb hauv kev ua haujlwm nrog ntau lub voj voog thiab cov khoom. Nws cov cheeb tsam loj ntawm lub zog rau cov khoom tseem ceeb tso nws ua ib qho tseem ceeb reagent, nrhiav kev siv nyob rau hauv ib tug Scope ntawm niaj hnub chaw uas txo cov lus teb yog qhov tseem ceeb. Qhov sib xyaw ua kom yooj yim thiab muaj peev xwm tshwm sim los ntawm nws lub peev xwm los koom nrog cov kev hloov pauv sib txawv, muab cov ntsiab lus ruaj khov kom ua tiav cov txiaj ntsig xav tau thoob plaws ntau qhov chaw. Tom qab ntawd, hypophosphorous acid tseem ua ib feem ntawm kev txhim kho kev xav txog kev npaj thiab kev hloov pauv ntawm cov voj voog niaj hnub tam sim no, qhia txog nws qhov tseem ceeb hauv kev tsav tsheb hauv ntau thaj chaw.
Yuav ua li cas yog hypophosphorous acid siv nyob rau hauv cov organic synthesis?
Lub zog diminishing kev ua ntawmhypophosphorous acidtso cai rau nws ua qhov kev txo qis hauv natural union. Ob peb qauv yog:
- Txo cov aldehydes thiab ketones rau cawv. Nws yog av ntau tshaj li sodium borohydride rau qhov kev hloov no.
- Txo cov nitro sib tov rau amines. Qhov no yog cov lus teb tseem ceeb rau kev npaj cov tshuaj amine-raws li, xim, polymers, thiab agrochemicals.
- Oxidative decolorization ntawm cov xim thiab ntxoov ntxoo. H3PO2 dyes hued natural mixtures.
- Txo cov quinones, azo xim, Schiff bases, epoxides, acetylenes, tsim alkenes, thiab lwm yam muaj txiaj ntsig sib sau ua ke thiab cov txheej txheem tsis txaus.
- Kev hloov pauv ntawm carboxylic acids rau aldehydes hauv ib kauj ruam.
- Deoxygenation teb zoo li Barton-McCombie deoxygenation kom tshem tawm hydroxyl sib sau ua ke.
- Extremist txo qis siv cov tshuaj hypophosphorous acid thiab ib qho kev pib loj heev.
Cov lus teb maj mam, utilitarian sib sau ua ke resilience, thiab yooj yim ua rau nws siv tau reagent rau natural blend. Nws suav nrog kev hloov pauv pheej yig dua rau cov kws tshaj lij txo qis xws li lithium aluminium hydride.
Dab tsi yog lub luag haujlwm ntawm hypophosphorous acid ua si hauv electroless plating?
Hypophosphorous acidyog siv dav hauv kev siv niaj hnub no, nrog rau ib qho ntawm nws lub hom phiaj tseem ceeb yog qhov tseem ceeb hauv electroless npib tsib xee plating cov lus teb rau cov metallization ntawm cov khoom tsis zoo. Hauv lub voj voog no, H3PO2 mus txog raws li tus kws tshaj lij txo qis, ua haujlwm nrog kev hloov pauv ntawm Ni2+ cov khoom los ntawm cov nickel ntsev rau hauv cov xim hlau npib tsib xee rau ntawm cov khoom sib txawv xws li plastics, iav, thiab ceramics.
Thaum lub sij hawm thaum nickel sulfate los yog chloride yog siv los ua cov nickel qhov chaw, cov kua qaub pab ntau yam peev xwm hauv cov txheej txheem plating. Txoj cai tawm ntawm tus puav, nws mus txog raws li tus kws tshaj lij txo qis, piv txwv tias yog ib qho tseem ceeb hauv kev hloov cov nickel particles rau hauv nickel hlau ntawm lub substrate. Ntxiv mus, nws nyob rau hauv raws li ib tug stabilizer, ntse tswj lub plating teb tus nqi thiab forestalling unconstrained disintegration, tom qab guaranteeing lub zog thiab unwavering zoo ntawm lub plating system. Tsis tas li ntawd, cov kua qaub muaj peev xwm ua tus kws tshaj lij tsis muaj zog, ntxiv rau kev kho cov nickel hauv kev teeb tsa thiab txhim kho kev ua haujlwm dav dav ntawm kev npaj plating.
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm kev siv cov tshuaj hypophosphorous acid hauv cov txheej txheem electroless nickel plating yog tsim cov txheej txheem plating ncaj qha uas tsis nyob ntawm kev siv cov hluav taws xob sab nraud. Qhov kev pom no tseem ceeb ua haujlwm ntawm lub plating system thiab txhim kho nws qhov kev txawj ntse. Tsis tas li ntawd, kev siv H3PO2 txhawb nqa cov ntsiab lus ntawm cov txheej txheem npib tsib xee, nrog cov thicknesses tsis tseem ceeb li 2 μm, ua rau nws tsim nyog rau ntau daim ntawv thov thoob plaws ventures xws li gadgets, pib, thiab aviation.
Hauv kev nthuav dav, cov khoom hloov pauv ntawm cov kua qaub ua rau nws yog ib qho tseem ceeb hauv cov txheej txheem electroless npib tsib xee plating, muab kev paub txog nyiaj txiag thiab cov tswv yim zoo rau kev ua tiav cov xim hlau zoo heev ntawm cov khoom siv tsis zoo. Nws txoj haujlwm ntau txheej raws li tus kws tshaj lij txo qis, ruaj khov, thiab tus kws kho mob tsis yooj yim ntxiv rau kev nce qib ntawm cov txheej txheem plating, txhawb nqa nws qhov kev txais tos nyob deb thiab dav hauv kev siv niaj hnub sib txawv.
Yuav ua li cas hypophosphorous acid tshem tawm cov hlau hauv kev kho dej?
Lub reactivity ntawmhypophosphorous acidNrog cov hlau tsis sib xws, suav nrog hlau, manganese, cobalt, thiab npib tsib xee, ua rau muaj kev sib xyaw ntawm cov phosphides uas tuaj yeem txhawb nqa tawm hauv dej. Cov cuab yeej zoo kawg no pom cov ntawv thov tseem ceeb hauv kev tshem tawm cov hlau los ntawm cov khoom siv hluav taws xob thiab cov dej khib nyiab niaj hnub no. Sau ua tus kws tshaj lij txo qis, H3PO2 ua haujlwm nrog kev hloov pauv ntawm oxidized dissolvable hlau qauv, xws li Fe3+, Mn2+, thiab Co2+, mus rau hauv qis oxidation xeev insoluble phosphides zoo li Ni3P , MnP, thiab Fe2P. Qhov tshwm sim los nag lossis daus ntawm cov hlau no txhawb nqa lawv qhov kev tshem tawm los ntawm kev pom, tshem tawm cov ntawv pov thawj hlau ntawm cov khoom siv kho vajtse thiab txo qis kev tso tawm ntawm cov hlau.
Tsis tas li ntawd, cov txheej txheem nag lossis daus hypophosphorous muaj qee qhov txiaj ntsig, vim nws tuaj yeem ua haujlwm tiag tiag ntawm cov hlau tsis tshua muaj hlau thiab hla ntau pH. Dissimilar rau cov tswv yim los nag-raws li sulfur, nws tsis nthuav tawm counter-particles uas yuav tsim tag nrho cov disintegrated solids nyob rau hauv dej, nyob rau hauv txoj kev no txwv tsis pub muaj kev cuam tshuam rau cov dej zoo. Feem ntau, lub peev xwm ntawm hypophosphorous acid tshwj xeeb tshem tawm cov hlau ua raws li kev ua haujlwm thiab kev txhawj xeeb ntawm ecological qhia nws qhov tseem ceeb hauv cov txheej txheem kho dej niaj hnub no.
Xaus
Lub extraordinary diminishing hwj chim ntawmhypophosphorous acidua rau nws muaj txiaj ntsig zoo nyob hauv ntau qhov chaw, suav nrog kev sib xyaw ua ke, electroplating, thiab kev kho dej. Nws lub peev xwm los ua kom tiav thiab deoxygenate ntau yam kev sib sau ua ke, txhawb nqa electroless npib tsib xee plating rau ntawm qhov chaw uas tsis yog-conductive, thiab ua hauj lwm nrog cov nag lossis daus ntawm cov hlau hnyav los ntawm cov dej hauv dej qhia txog nws cov khoom siv hluav taws xob. Nyob rau hauv lub point thaum siv raws li kev cai hais txog systems, lub acid tshwm sim raws li kev paub txog nyiaj txiag thiab ntau yam reagent rau redox cov lus teb hauv ob qho tib si niaj hnub thiab cov chaw tshawb fawb. Nws cov ntawv thov ntau txheej thiab tsis muaj kev cuam tshuam zoo hauv kev tsav tsheb cov txheej txheem sib txawv ua rau nws qhov tseem ceeb ua ib feem tseem ceeb hauv kev tshawb fawb niaj hnub thiab cov khoom siv science.
Cov ntaub ntawv
1. Habib, MA, Gonzalez, WG, Sultan, W., & Sahoo, RN (2019). Hypophosphorous Acid thiab nws cov ntsev: Electroless Deposition. Kirk-Othmer Encyclopedia of Chemical Technology.
2. Kurosaki, T., Kitaura, K., Satokawa, S., Yada, A., Kimura, K., & Imamura, M. (1995). Txo cov tshuaj tsw qab nitro nrog hypophosphorous acid-lead (II) chloride. Phau ntawv xov xwm ntawm Chemical Society of Japan, 68(6), 1889-1892.
3. Solanki, R., & Modak, JM (2012). Reductive decolorization ntawm dye solutions nrog hypophosphorous acid thiab hydrogen peroxide co-catalyst system. Indian Journal of Chemical Technology, 19, 286-293.
4. Stecher, H. (1968). Merck Index ntawm Tshuaj thiab Tshuaj. Merck & Company Incorporated.
5. Zhang, W., Zhuang, J., Wang, X., Li, W., Zheng, X., & Cheng, F. (2015). Txo cov tshuaj tsw qab nitro catalyzed los ntawm hlau phthalocyanines los yog porphyrins nyob rau hauv lub xub ntiag ntawm hypophosphorous acid. RSC Advances, 5(52), 41572-41577.