Naphthalenacetic acid(NAA) yog ib tug broad-spectrum cog kev loj hlob regulator, uas yuav txhawb cell division thiab expansion, induce tsim ntawm adventitious keeb kwm, nce txiv hmab txiv ntoo, tiv thaiv cov txiv hmab txiv ntoo poob, thiab hloov tus piv ntawm poj niam thiab txiv neej paj. Nws nkag mus rau hauv cov nroj tsuag thiab thauj mus rau tag nrho cov nroj tsuag nrog rau cov as-ham txaus. Naphthalene acetic acid yog tsim rau cov qoob loo thiab cov txiv hmab txiv ntoo: thaum siv rau cov qoob loo cereal, nws tuaj yeem nce tillering, spike tus nqi thiab txhiab-grain hnyav; Thaum thov rau cov ntoo txiv hmab txiv ntoo, nws tuaj yeem txhawb kev tawg paj, tiv thaiv cov txiv hmab txiv ntoo poob, thiab ua tiav cov txiaj ntsig ntawm kev ua kom ripening thiab nce ntau lawm. Daim ntawv thov ntawm naphthaleneacetic acid nyob rau hauv cov qoob loo, txiv hmab txiv ntoo, zaub thiab horticultural nroj tsuag muaj kev vam meej, thiab kev tshawb fawb ntawm nws cov txheej txheem thiab cov txiaj ntsig yog qhov tseem ceeb, thiab muaj ntau cov ntaub ntawv qhia txog cov ntaub ntawv.
Scope ntawm daim ntawv thov Naphthaleneacetic acid yog siv nyob rau hauv cereal qoob loo kom tillering, spike tus nqi thiab txhiab-grain hnyav; naphthaleneacetic acid yog siv rau hauv paj rwb los txo cov paj tawg, nce txiv duaj hnyav thiab txhim kho zoo. Naphthalenacetic acid yog siv rau cov txiv hmab txiv ntoo los txhawb kev paj, tiv thaiv cov txiv hmab txiv ntoo poob, ua kom ripening thiab nce ntau lawm. Naphthalenacetic acid yog siv rau cov txiv hmab txiv ntoo thiab zaub kom tsis txhob poob paj thiab tsim cov txiv hmab txiv ntoo uas tsis muaj noob; naphthalenacetic acid yog siv los txiav cov ceg los txhawb cov cag, thiab lwm yam.
Naphthaleneacetic acid degrades maj mam nyob rau hauv lub teeb pom kev, thiab degradation tus nqi ntawm ultraviolet lub teeb nrog ib tug tseem ceeb wavelength ntawm 254nm yog loj dua li ntawm ib tug dominant wavelength ntawm 365nm. Anatase TiO2hmoov muaj cov nyhuv catalytic zoo rau photodegradation ntawm naphthalenacetic acid. Nyob rau hauv 254nm ultraviolet hluav taws xob, lub photolysis ib nrab-lub neej luv luv ntawm 60min mus rau 39min. Lub photodegradation ntawm naphthaleneacetic acid yog ib qho yooj yim mus rau hauv lub xub ntiag ntawm oxygen, thiab cov tshuaj tiv thaiv no yog thawj-txiav txim kinetic cov tshuaj tiv thaiv rau NAA. Nws photodegradation feem ntau tshwm sim raws li oxidative decarboxylation, -H ntawm lub nplhaib uas muaj ntxhiab yog hloov los ntawm -OH, thiab tom qab ntawd lub nplhaib naphthalene tawg thiab oxidized rau phthalic acid thiab nws cov derivatives.
Muaj ntau txoj hauv kev los ua ke 1-Naphthaleneacetic acid, hauv qab no yog qee txoj hauv kev:
1. Diazo compound method: Cov kauj ruam ntawm txoj kev no tau muab rau hauv nqe lus nug dhau los.
Kauj Ruam 1: Npaj Barbituric acid los ntawm nitronaphthalene thiab acetone.
Kauj Ruam 2: react barbituric aldehyde nrog diazomethane kom tau txais 1-Naphthylmethylbarbituric acid.
Kauj Ruam 3: 1-naphthylmethylbarbiturine yog reacted nrog sodium hydroxide kom tau txais 1-Naphthylacetic acid.
Kauj Ruam 4: Kho 1-naphthoic acid nrog ethyl iodide hauv methanol kom tau txais 1-naphthylacetic acid.
2. Phenolic txoj kev: npaj resorcinol nrog phenol thiab formaldehyde, thiab ces react resorcinol nrog naphthaleneacetaldehyde kom tau txais 1-naphthaleneacetic acid.
Kauj ruam 1: React phenol thiab formaldehyde nyob rau hauv acidic tej yam kev mob kom tau resorcinol (2-Hydroxyphenylphenol).
Kauj Ruam 2: Resorcinol thiab naphthalene acetaldehyde react nyob rau hauv alkaline tej yam kev mob los tsim 1-naphthyl{2}}(2-hydroxyphenyl)ethene (1-Naphthyl-2-({{6} }hydroxyphenyl)ethene).
Kauj Ruam 3: Cov tshuaj tiv thaiv ntawm 1-naphthyl-2-(2-hydroxyphenyl)ethylene nrog sodium hydroxide muab 1-naphthylacetic acid.
Cov tshuaj formula yog raws li nram no:
Kauj Ruam 1: Phenol ntxiv rau Formaldehyde → Resorcinol
Kauj Ruam 2: Resorcinol ntxiv rau naphthaleneacetaldehyde → 1-naphthyl{2}}(2-}hydroxyphenyl)ethene
Kauj Ruam 3: 1-naphthyl-2-(2-hydroxyphenyl)ethene ntxiv rau NaOH → 1-naphthylacetic acid
3. Aryl pawg hloov cov tshuaj tiv thaiv txoj kev: Cov kauj ruam ntawm txoj kev no tau muab rau hauv nqe lus nug dhau los.
Cov kauj ruam ua ke ntawm cov tshuaj tsw qab pab pawg hloov cov txheej txheem ntawm 1-Naphthalene acetic acid yog raws li nram no:
Kauj Ruam 1: React benzoic acid thiab naphthalene nyob rau hauv lub xub ntiag ntawm sulfuric acid los tsim Naphthylbenzoic acid.
Kauj Ruam 2: React naphthylbenzoic acid nrog bromoacetic acid nyob rau hauv lub xub ntiag ntawm sodium hydroxide los tsim 1-naphthylacetic acid.
Cov tshuaj formula yog raws li nram no:
Kauj Ruam 1: Benzoic acid ntxiv rau Naphthalene ntxiv rau H2YOG4→ Naphthylbenzoic acid
Kauj Ruam 2: Naphthylbenzoic acid ntxiv rau BrCH2COOH plus NaOH → 1-naphthylacetic acid
4. Carbon dioxide catalytic method: siv styrene thiab CO2kom hnov mob nyob rau hauv muaj cov catalyst kom tau txais 1-naphthalenacetic acid.
Kauj Ruam 1: React styrene thiab carbon dioxide nyob rau hauv lub teeb kom tsim carboxylate.
Kauj Ruam 2: Hydrolyze cov carboxylate nyob rau hauv cov xwm txheej yooj yim los tsim 1-naphthaleneacetic acid.
Cov tshuaj formula yog raws li nram no:
Kauj Ruam 1: Styrene plus CO2ntxiv rau Lub Teeb → Carboxylate
Kauj Ruam 2: Carboxylate ntxiv NaOH → 1-Naphthylacetic acid
5. Photooxidation txoj kev: siv naphthalene thiab ethylene acid los ua raws li lub teeb kom tau txais 1-naphthylacetic acid.
Kauj Ruam 1: Tshaj tawm naphthalene ethanol thiab huab cua rau ultraviolet rays rau photooxidation los tsim 1-naphthylacetic acid.
Cov tshuaj formula yog raws li nram no:
Naphthalene ethanol plus O2ntxiv lub teeb → 1-naphthylacetic acid
Nws yuav tsum raug sau tseg tias txoj kev no tsis tas yuav muaj cov tshuaj tiv thaiv tshwj xeeb thiab cov tshuaj reagents, thiab kev ua haujlwm yog yooj yim, tab sis lub sij hawm cov tshuaj tiv thaiv ntev thiab cov khoom purity tsawg. Tsis tas li ntawd, txoj kev no tsuas yog siv tau rau cov tebchaw uas muaj ntxhiab hydroxyl pawg xws li naphthalene ethanol, thiab tsis siv rau lwm cov tebchaw. Cov txheej txheem sib txawv sib txawv muaj qhov zoo thiab qhov tsis zoo, thiab cov qauv tsim nyog yuav tsum raug xaiv rau kev sib xyaw ua ke raws li qhov xav tau tiag tiag.