Qhov sib txawv tseem ceeb ntawm phenols thiab polyphenols yog tias phenol yog cov tshuaj tsw qab uas muaj lub nplhaib benzene hloov nrog ib pawg hydroxyl whereas polyphenols yog cov tshuaj tsw qab uas muaj ntau tshaj ib pawg phenolic.
Ob leeg phenols thiab polyphenols muaj ib pab pawg hydroxyl (-OH) ua lawv pawg ua haujlwm. Cov no yog cov tshuaj tsw qab organic.
Phenols yog dab tsi?
Phenols yog cov organic tebchaw uas muaj cov tshuaj formula HO-C6H5 Cov no yog cov qauv uas muaj ntxhiab vim lawv muaj lub nplhaib benzene. Phenol tuaj yeem ua tau raws li cov khoom dawb uas yog volatile. Cov tshuaj no yog ib qho me me acidic compound vim muaj cov proton tshem tau ntawm pawg hydroxyl ntawm phenol. Tsis tas li ntawd, peb yuav tsum daws cov tshuaj phenol nrog kev saib xyuas txhawm rau tiv thaiv kev kub hnyiab.
Daim duab 01: Cov qauv ntawm Phenol
Phenol tuaj yeem tsim los ntawm kev rho tawm los ntawm thee tar. Txoj kev tseem ceeb ntawm kev tsim khoom yog los ntawm cov khoom siv roj av. Cov txheej txheem ntawm kev tsim cov phenol yog "cov txheej txheem cumene". Cov khoom dawb ntawm phenol no muaj cov ntxhiab tsw qab uas yog tarry. Ntxiv mus, nws yog soluble hauv dej vim nws polarity.
Phenol nyhav dhau los ua cov tshuaj tiv thaiv electrophilic vim tias cov khoom siv hluav taws xob ib leeg ntawm cov pa atom tau pub rau lub nplhaib qauv. Yog li ntawd, ntau pab pawg, nrog rau halogens, acyl pawg, sulfur-muaj pawg, thiab lwm yam.tuaj yeem hloov tau rau lub nplhaib no. Phenol tuaj yeem txo qis rau benzene ntawm distillation nrog zinc plua plav.
Dab tsi yog Polyphenols?
Polyphenols yog cov tshuaj tsw qab loj uas muaj ntau tshaj ib pawg phenolic. Cov tebchaw no tshwm sim raws li ntuj tsim los yog tuaj yeem ua los ntawm cov khoom siv hluavtaws. Qee zaum, tuaj yeem muaj cov ntaub ntawv semi-synthetic thiab. Polyphenols tuaj yeem pom feem ntau raws li cov tebchaw loj heev. Tsis tas li ntawd, cov tshuaj no zoo li tau tso rau hauv cell vacuoles. Qhov hnyav molecular ntawm polyphenols tso cai rau lawv kom nrawm nrawm thoob plaws cell membranes.
Daim duab 02: Cov nroj tsuag muab tau los ntawm Polyphenol, Tannic Acid
Tsis tas li ntawd, polyphenols muaj cov tshuaj heteroatomic uas tsis yog pawg hydroxyl. Ether pawg thiab ester pawg muaj ntau. Thaum xav txog cov khoom siv tshuaj lom neeg ntawm cov molecules, lawv muaj UV / pom kev nqus vim muaj cov pab pawg muaj ntxhiab. Lawv kuj muaj autofluorescence zog. Tsis tas li ntawd, lawv yog cov reactive heev rau oxidation.
Thaum xav txog kev siv cov tshuaj no, tib neeg ib txwm siv nws ua cov tshuaj zas xim. Ntxiv mus, muaj qee qhov kev siv tshuaj lom neeg, xws li:
- YKev tso tawm ntawm kev loj hlob hormone hauv cov nroj tsuag
- Txhim kho cov tshuaj hormones hauv cov nroj tsuag
- Ua raws li kev taw qhia cov molecules hauv ripening thiab lwm yam kev loj hlob
- Kev tiv thaiv kab mob microbial.
Qhov txawv ntawm Phenols thiab Polyphenols yog dab tsi?
Qhov sib txawv tseem ceeb ntawm phenols thiab polyphenols yog tias phenol yog cov tshuaj tsw qab uas muaj lub nplhaib benzene hloov nrog ib pawg hydroxyl thaum polyphenols yog cov tshuaj tsw qab uas muaj ntau tshaj ib pawg phenolic. Ntxiv mus, phenols muaj ib pawg phenolic rau ib lub molecule thaum polyphenols muaj ntau tshaj ib pawg phenolic ib molecule.
Cov lus hauv qab no qhia txog qhov sib txawv ntawm phenols thiab polyphenols.
Summary – Phenols vs Polyphenols
Ob leeg phenols thiab polyphenols muaj ib pab pawg hydroxyl (-OH) ua lawv pawg ua haujlwm. Cov no yog cov tshuaj tsw qab organic. Qhov sib txawv tseem ceeb ntawm phenols thiab polyphenols yog tias phenol yog cov tshuaj tsw qab uas muaj lub nplhaib benzene hloov nrog pawg hydroxyl thaum polyphenols yog cov tshuaj tsw qab uas muaj ntau tshaj ib pawg phenolic..
