Kaphatikizidwe ndi mawonekedwe owala amadzi -soluble cellulose ether/EU (III)

Synthetic madzi -soluble cellulose ether/EU (III) yokhala ndi ntchito yowala, yomwe ndi carboxymethyl cellulose (CMC)/EU (III), methyl cellulose (MC)/EU (III), ndi Hydroxyeyl cellulose (HEC)/EU (III) imakambirana za kapangidwe kazinthu izi ndipo imatsimikiziridwa ndi FTIR. Kukhazikitsidwa kwazinthu zofananirazi ndi EU (III) pa 615nm. Kusintha kwa zidole zamagetsi (ndi 5D0→7f2 pa. Kusintha kwa CMC kumakhudza mawonekedwe a fulorosenti ndi mphamvu ya CMC/EU (III). Zomwe zili mu EU (III) zimakhudzanso mphamvu ya fulorosenti ya zovutazo. Pamene EU (III) zili ndi 5% (misa chiŵerengero), mphamvu fulorosenti awa madzi -soluble mapadi efa EU (III) machesi anafika pazipita.

Mawu osakira: madzi - sungunuka cellulose ether; Eu (III); zofanana; chowala

1.Mawu Oyamba

Cellulose ndi liniya macrometer waβ-D glucose unit yolumikizidwa ndi mowa (1,4). Chifukwa cha zongowonjezwdwa, biodegradable, biocompatibility, kafukufuku wa mapadi akuchulukirachulukira. Ma cellulose amagwiritsidwanso ntchito ngati chophatikizira cha optical, magetsi, maginito, ndi catalytic performance ngati gulu lamagulu angapo a alkyr oxygen ligand. Y.OKAMOTO ndi ogwira nawo ntchito aphunzira mayeso okonzekera ndi ntchito zomwe zili ndi ma polima a ayoni achitsulo padziko lapansi osowa. Iwo adawona kuti CMC / TB yofanana ndi compuer ili ndi fulorosenti yolimba yozungulira polarizing. CMC, MC, ndi HEC, monga chofunika kwambiri ndi ambiri ntchito mapadi madzi -soluble mapadi, alandira chidwi kwambiri chifukwa cha ntchito yawo yabwino solubility ndi ntchito yaikulu mtengo, makamaka fulorosenti kulemba luso Kapangidwe ka mapadi mu njira amadzimadzi kwambiri. ogwira.

Nkhaniyi lipoti angapo madzi -soluble mapadi efa, ndicho kukonzekera, kapangidwe ndi fulorosenti katundu zopangidwa ndi matomoid opangidwa ndi CMC, MC ndi HEC ndi EU (III).

2. Yesani

2.1 Zida zoyesera

CMC (degree of substitution (DS) ndi 0.67, 0.89, 1.2, 2.4) ndipo HEC amaperekedwa mokoma mtima ndi KIMA CHEMICAL CO.,LTD.

MC (DP=450, viscosity 350 ~ 550mpa·s) imapangidwa ndi KIMA CHEMICAL CO., LTD. Eu2O3 (AR) imapangidwa ndi Shanghai Yuelong Chemical Factory.

2.2 Kukonzekera kwa CMC (HEC, MC) /Eu(III) zovuta

EuCl3·6H2O yankho (yankho A): Sungunulani Eu2Os mu 1: 1 (chiŵerengero cha voliyumu) ​​HCI ndi kuchepetsa ku 4. 94X 10-2 mol / L.

CMC/Eu(III) complex solid state system: Sungunulani 0.0853g ya CMC yokhala ndi ma DS osiyanasiyana m'madzi, kenaka onjezerani kuchuluka kwa Eu(III) dropwise ku njira yake yamadzi, kuti chiŵerengero cha CMC:Eu(III) chikhale 19: 1. Onetsetsani, reflux kwa maola 24, tembenuzani nthunzi mpaka kuuma, pukutani mouma, perani kukhala ufa ndi matope a agate.

CMC (HEC, MC/Eu(III) njira yothetsera madzi: Tengani chitsanzo cha 0.0853 g cha CMC (kapena HEC kapena MC)) ndikusungunula mu H2O, kenaka yikani milingo yosiyanasiyana ya yankho A (kukonza zovuta zosiyanasiyana za Eu(III) Concentration complex. ), kusonkhezera, kutentha kwa reflux, kusunthira ku botolo la volumetric, kuwonjezera madzi osungunuka kuti achepetse chizindikirocho.

2.3 Fluorescence spectra ya CMC (HEC, MC) /Eu(III) complexes

Makina onse ovuta amadzimadzi adayesedwa ndi RF-540 fluorescence spectrophotometer (Shimadzu, Japan). CMC/Eu(III) solid-state system idayezedwa ndi Hitachi MPE-4 fluorescence spectrometer.

2.4 Fourier amasintha mawonekedwe a infuraredi a CMC (HEC, MC) /Eu(III)complexes

FTIR IR ya zovutazo zidalimbitsidwa ndi Aralect RFX-65AFTIR ndikukanikiza mapiritsi a KBr.

3. Zotsatira ndi Zokambirana

3.1 Mapangidwe ndi mapangidwe a CMC (HEC, MC) /Eu (III) maofesi

Chifukwa cha kuyanjana kwa electrostatic, CMC ili mumgwirizano mu njira yochepetsera amadzimadzi, ndipo mtunda wapakati pa maunyolo a CMC ndi kutali, ndipo mphamvu yogwirizana ndiyofooka. Eu(III) ikawonjezedwa munjira yothetsera vutoli, maunyolo a CMC a molekyulu mu yankho Zinthu zofananira zonse zimasinthidwa, kuchuluka kwa electrostatic kwa yankho loyambirira kumawonongeka, ndipo unyolo wa ma cell a CMC umakonda kupindika. Eu (III) akaphatikizana ndi gulu la carboxyl mu CMC, malo omangirira amakhala mwachisawawa (1:16), Chifukwa chake, mu njira yochepetsera yamadzimadzi, Eu(III) ndi CMC zimalumikizidwa mwachisawawa ndi gulu la carboxyl mu unyolo. kugwirizana mwachisawawa kumeneku pakati pa Eu(III) ndi CMC unyolo maselo si yabwino kwa amphamvu fulorosenti umuna, chifukwa Zimapanga mbali ya chiral udindo kutha. Yankho likatenthedwa, kusuntha kwa maunyolo a CMC kumachulukitsidwa, ndipo mtunda pakati pa maunyolo a CMC umafupikitsidwa. Panthawiyi, mgwirizano pakati pa Eu(III) ndi magulu a carboxyl pakati pa CMC unyolo wa ma molekyulu ndiwosavuta kuchitika.

Kulumikizana uku kumatsimikiziridwa mu mawonekedwe a CMC/Eu(III) FTIR. Poyerekeza ma curve (e) ndi (f), nsonga ya 1631cm-1 pamapindikira (f) imafooka mu (e), ndipo nsonga ziwiri zatsopano 1409 ndi 1565cm-1 zimawonekera pamapindikira (e), omwe ndi COO - Base vs ndi vas, ndiko kuti, CMC/Eu(III) ndi mchere, ndipo CMC ndi Eu(III) amamangidwa makamaka ndi ma ionic. Pamphepete (f), nsonga ya 1112cm-1 yopangidwa ndi kuyamwa kwa mawonekedwe a aliphatic ether ndi nsonga yotakata pa 1056cm-1 chifukwa cha kapangidwe ka acetal ndi hydroxyl imachepetsedwa chifukwa cha mapangidwe a zovuta, ndipo nsonga zabwino zimawonekera. . Ma elekitironi awiri okha a O atomu mu C3-O ndi ma elekitironi awiri a O atomu mu ether sanachite nawo kugwirizana.

Poyerekeza ma curve (a) ndi (b), zitha kuwoneka kuti magulu a MC mu MC/Eu (III), kaya ndi okosijeni mu gulu la methoxyl kapena mpweya mu mphete ya glucose ya anhydrous, amasintha, zomwe zikuwonetsa. kuti mu MC Ma oxygen onse amakhudzidwa ndi mgwirizano ndi Eu(III).

3.2 Mawonekedwe a Fluorescence a CMC (HEC, MC) / Eu(III) zovuta ndi zomwe zimakhudzidwa

3.2.1 Fluorescence mawonekedwe a CMC (HEC, MC) /Eu(III)

Popeza kuti mamolekyu amadzi ndi othandiza kuzimitsa fulorosenti, mphamvu ya ma hydrated lanthanide ions nthawi zambiri imakhala yofooka. Pamene ma Eu(III) ma ion amalumikizidwa ndi efa yosungunuka m'madzi, makamaka ndi mamolekyu a polyelectrolyte CMC, gawo kapena mamolekyu onse ophatikizidwa amadzi amatha kuchotsedwa, ndipo mphamvu ya Eu (III) idzakulitsidwa chifukwa cha izi. Mawonekedwe otulutsa amitundu yonseyi ali ndi 5D0→7F2 electric dipole transition of Eu(III) ion, yomwe imapanga pachimake pa 618nm.

3.2.2 Zinthu zomwe zimakhudza mphamvu ya fluorescence ya CMC (HEC, MC) /Eu(III) complexes

Makhalidwe a ma cellulose ethers amakhudza mphamvu ya fluorescence, mwachitsanzo, ma complexes a CMC/Eu(III) opangidwa ndi ma DS osiyanasiyana ali ndi mitundu yosiyanasiyana ya fluorescence. Pamene DS ya CMC si 0.89, mawonekedwe a fluorescence a CMC/Eu(III) amangokhala ndi nsonga ya 618nm, koma pamene DS ya CMC ili 0.89, mkati mwa kuyesa kwathu, CMC/Eu yolimba ( III) III) Pali nsonga ziwiri zofooka zotulutsa mpweya, ndi maginito dipole kusintha 5D0.→7F1 (583nm) ndi kusintha kwa dipole yamagetsi 5D0→7F3 (652nm). Kuonjezera apo, mphamvu za fluorescence za zovutazi ndizosiyana. Mu pepala ili, mphamvu yotulutsa Eu (III) pa 615nm idakonzedwa motsutsana ndi DS ya CMC. Pamene DS ya CMC=0.89, kuwala kwamphamvu kwa CMC/Eu(III) kolimba kumafika pachimake. Komabe, mamasukidwe akayendedwe (DV) a CMC alibe mphamvu pakukula kwa fulorosenti mkati mwa kafukufukuyu.

4 Mapeto

Zotsatira zomwe zili pamwambazi zikutsimikizira kuti ma complexes a cellulose cellulose ether/Eu(III) osungunuka m'madzi ali ndi mphamvu zotulutsa fulorosisi. Mawonekedwe otulutsa azinthu izi ali ndi kusintha kwamagetsi kwa Eu(III), ndipo nsonga ya 615nm imayamba chifukwa Yopangidwa ndi 5D0.→Kusintha kwa 7F2, chikhalidwe cha cellulose ether ndi zomwe zili mu Eu(III) zingakhudze mphamvu ya fluorescence.