Iyo synthesis uye inopenya maitiro emvura -soluble cellulose ether/EU (III)

Synthetic mvura -soluble cellulose ether/EU (III) ine luminous performance, zvinoti, carboxymethyl cellulose (CMC)/EU (III), methyl cellulose (MC)/EU (III), uye Hydroxyeyl cellulose (HEC)/EU (III) inokurukura chimiro cheaya maomesheni uye inosimbiswa neFTIR.Iyo yekutanga spectrum yezvinhu izvi zvinoenderana ndeyeEU (III) pa615nm.Yemagetsi puppet shanduko (ne5D0→7F2).Kutsiviwa kweCMC kunobata fluorescent spectrum uye simba reCMC/EU (III).Iyo EU (III) yemukati inokanganisawo simba refluorescent reiyo yakaoma.Kana iyo EU (III) yemukati iri 5% (huwandu hwehuwandu), simba refluorescent remvura -soluble cellulose ether EU (III) machisi akasvika pakakwirira.

Keywords: mvura -soluble cellulose ether;Eu (III);matched;kupenya

1.Nhanganyaya

Cellulose ndiyo mutsara macrometer yeβ-D glucose unit yakabatana ne (1,4) doro.Nekuda kwekuvandudzwa kwayo, biodegradable, biocompatibility, kudzidza kwe cellulose kuri kuwedzera Iyo yakanyanya kutariswa.Cellulose inoshandiswawo semusanganiswa we optical, magetsi, magineti, uye catalytic performance seyakawanda-official group's alkyr oxygen ligand.Y.OKAMOTO nevabatsiri vakadzidza bvunzo dzekugadzirira uye maapplication ane isingawanzo simbi pasi simbi polymers.Vakaona kuti CMC/TB inofananidzwa nekomputa ine yakasimba kutenderera polarizing fluorescent.CMC, MC, uye HEC, seyakanyanya kukosha uye yakashandiswa zvakanyanya selulosi mvura -soluble cellulose, yakagamuchira kutariswa kukuru nekuda kwekuita kwavo kwakanaka kwekunyungudika uye kukosha kwakawanda kwekushandisa, kunyanya iyo fluorescent labeling tekinoroji. inoshanda.

Ichi chinyorwa chinoshuma nhevedzano yemvura -soluble cellulose ether, kureva kugadzirira, chimiro uye fluorescent zvimiro zvakaumbwa nematomoid inoumbwa neCMC, MC uye HEC uye EU (III).

2. Kuedza

2.1 Kuedza zvinhu

CMC (degree of substitution (DS) ndeye 0.67, 0.89, 1.2, 2.4) uye HEC inopihwa nemutsa neKIMA CHEMICAL CO.,LTD.

MC (DP = 450, viscosity 350 ~ 550mpa·s) inogadzirwa neKIMA CHEMICAL CO., LTD.Eu2O3 (AR) inogadzirwa neShanghai Yuelong Chemical Factory.

2.2 Kugadzirira kweCMC (HEC, MC) /Eu(III) yakaoma

EuCl3·6H2O mhinduro (mhinduro A): bvisa Eu2Os mu1: 1 (vhoriyamu reshiyo) HCI uye dilute kusvika 4. 94X 10-2 mol/L.

CMC/Eu(III) yakaoma solid state system: Dissolve 0.0853g yeCMC ine maDS akasiyana mumvura, wobva wawedzera huwandu hweEu(III) inodonha kune yayo aqueous solution, kuti huwandu hwehuwandu hweCMC:Eu(III) huite 19: 1. Kurudzira, reflux kwemaawa makumi maviri nemana, rotary evaporate kusvika pakuoma, vacuum yakaoma, kukuya kuhupfu neagate mortar.

CMC (HEC, MC/Eu(III) aqueous solution system: Tora 0.0853 g yeCMC (kana HEC kana MC)) sampuli woinyungudutsa muH2O, wobva wawedzera huwandu hwakasiyana hwemhinduro A (kugadzirira dzakasiyana Eu(III) Concentration complex. ), yakabvongodzwa, inopisa kuti iite reflux, yakatamira kune imwe nhamba yevolumetric flask, yakawedzera mvura yakasvibiswa kuti iwedzere kune chiratidzo.

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

Yese yakaoma aqueous masisitimu akayerwa neRF-540 fluorescence spectrophotometer (Shimadzu, Japan).Iyo CMC/Eu(III) solid-state system yakayerwa neHitachi MPE-4 fluorescence spectrometer.

2.4 Fourier inoshandura infrared spectroscopy yeCMC (HEC, MC) /Eu(III)complexes

Iyo FTIR IR yeiyo yakaoma yakasimbiswa neAralect RFX-65AFTIR uye yakatsikirirwa mumahwendefa eKBR.

3. Migumisiro uye Hurukuro

3.1 Kuumbwa uye chimiro cheCMC (HEC, MC) /Eu(III) complexes

Nekuda kwekudyidzana kweelectrostatic, CMC iri mukuenzana mumushonga wemvura inoyerera, uye chinhambwe chiri pakati peCMC cheni dzemamorekuru chiri kure, uye simba rekubatana harina simba.Kana Eu(III) yawedzerwa inodonha mumhinduro, iyo CMC mamorekuru cheni mumhinduro Iyo conformational zvimiro zvese zvinoshandurwa, iyo electrostatic chiyero chemhinduro yekutanga inoparadzwa, uye CMC mamorekuru cheni inotenderera.Kana Eu(III) yasangana neboka recarboxyl muCMC, nzvimbo yekubatanidza haina kurongeka (1:16), Naizvozvo, mumushonga wemvura inoyerera, Eu(III) neCMC zvinosanganiswa zvisina tsarukano neboka recarboxyl mucheni, uye ichi chisungo chisungo pakati peEu(III) neCMC molecular cheni hachina kunaka kune yakasimba fluorescence emission, nekuti Inoita chikamu chechiral chinzvimbo chinonyangarika.Kana mhinduro ichipisa, kufamba kweCMC molecular cheni kunokwidziridzwa, uye chinhambwe chiri pakati peCMC mamorekuru cheni chinopfupikiswa.Panguva ino, kubatana pakati peEu(III) nemapoka ecarboxyl pakati peCMC molecular cheni zviri nyore kuitika.

Kubatana uku kunosimbiswa muCMC/Eu(III) FTIR spectrum.Kuenzanisa macurves (e) uye (f), iyo 1631cm-1 peak in curve (f) inopera simba mu (e), uye maviri matsva epamusoro 1409 uye 1565cm-1 anooneka mu curve (e), ari COO - Base vs uye vas, kureva kuti, CMC/Eu(III) chinhu chemunyu, uye CMC neEu(III) dzinonyanya kusungwa ne ionic bond.Mu curve (f), iyo 1112cm-1 peak yakaumbwa nekutorwa kwealiphatic ether chimiro uye yakafara absorption peak pa 1056cm-1 inokonzerwa neacetal chimiro uye hydroxyl yakatetepa nekuda kwekuumbwa kwemacomplexes, uye mapeaks akanaka anooneka. .Maerekitironi maviri ega eO atomu muC3-O uye maerekitironi maviri ega eO atomu muether haana kutora chikamu mukubatana.

Kuenzanisa macurves (a) uye (b), zvinogona kuonekwa kuti mabhandi eMC muMC / Eu (III), ingave iyo okisijeni iri muboka remethoxyl kana kuti okisijeni iri muanhydrous glucose ring, inoshanduka, inoratidza. kuti muMC Okisijeni Yese inobatanidzwa mukubatana neEu(III).

3.2 Fluorescence spectra yeCMC (HEC, MC) / Eu(III) maokisheni uye ayo anopesvedzera zvinhu

3.2.1 Fluorescence spectra yeCMC (HEC, MC) /Eu(III) complexes

Sezvo mamorekuru emvura ari anoshanda efluorescence quenchers, kusimba kweiyo hydrated lanthanide ion kunowanzo kushaya simba.Kana Eu(III) ions inobatanidzwa nemvura-inonyungudika cellulose ether, kunyanya ine polyelectrolyte CMC mamorekuru, chikamu kana ese emvura akarongedzerwa mamorekuru anogona kusabatanidzwa, uye emission intensity yeEu(III) inowedzerwa semhedzisiro.Iyo emission spectra yeaya macomplexes ese ane iyo 5D0→7F2 yemagetsi dipole shanduko yeEu(III) ion, iyo inoburitsa peak pa618nm.

3.2.2 Zvinhu zvinokanganisa fluorescence properties yeCMC (HEC, MC) /Eu(III) complexes

Zvimiro zve cellulose ethers zvinokanganisa kusimba kwefluorescence, semuenzaniso, macomplexes CMC/Eu(III) anoumbwa neakasiyana maDS ane akasiyana fluorescence properties.Kana iyo DS yeCMC isiri 0.89, iyo fluorescence spectrum yeCMC/Eu(III) ine peak pa618nm, asi kana iyo DS yeCMC iri 0.89, mukati mechikamu chekuyedza kwedu, yakasimba CMC/Eu( III) III) Kune maviri asina kusimba emission peaks mune emission spectrum, iwo magineti dipole shanduko 5D0.→7F1 (583nm) uye yemagetsi dipole shanduko 5D0→7F3 (652nm).Mukuwedzera, iyo fluorescence intensity yeiyi yakaoma zvakare yakasiyana.Mupepa iri, kusimba kweEu (III) pa615nm kwakarongerwa DS yeCMC.Kana iyo DS yeCMC = 0.89, kusimba kwechiedza cheiyo solid-state CMC/Eu(III) inosvika pakakwirira.Nekudaro, iyo viscosity (DV) yeCMC haina mhedzisiro pakusimba kwefluorescence yezvakaoma mukati mechikamu chechidzidzo ichi.

4 Mhedziso

Mibairo iri pamusoro inosimbisa zvakajeka kuti macomplexes emvura-soluble cellulose ether/Eu(III) ane fluorescence emission properties.Iyo emission spectra yeaya maokisheni ane emagetsi dipole shanduko yeEu(III), uye iyo yepamusoro pa615nm inokonzerwa ne Yakagadzirwa ne5D0.→7F2 shanduko, chimiro che cellulose ether uye zvirimo muEu(III) zvinogona kukanganisa kusimba kwefluorescence.