I-synthesis nezici ezikhanyayo ze-water-soluble cellulose ether/EU (III)

I-synthetic water -soluble cellulose ether/EU (III) esebenza ngokukhanyayo, okungukuthi, i-carboxymethyl cellulose (CMC)/EU (III), i-methyl cellulose (MC)/EU (III), kanye ne-Hydroxyeyl cellulose (HEC)/EU (III) ixoxa ngesakhiwo salezi zinkimbinkimbi futhi iqinisekiswa yi-FTIR. I-spectrum yokwethulwa yalezi zinto ezifanayo yi-EU (III) ku-615nm. Inguquko kapopayi kagesi (ngo-5D0→7F2). Ukushintshwa kwe-CMC kuthinta i-spectrum ye-fluorescent namandla e-CMC/EU (III). Okuqukethwe kwe-EU (III) kuphinde kuthinte amandla e-fluorescent enkimbinkimbi. Uma okuqukethwe kwe-EU (III) kungu-5%(isilinganiso sobuningi), amandla e-fluorescent alawa mameshi e-cellulose ether EU (III) ancibilika emanzini afinyelela inani eliphakeme kakhulu.

Amagama angukhiye: amanzi-ether cellulose encibilikayo; I-Eu (III); kufaniswe; elikhazimulayo

1.Isingeniso

I-Cellulose iyi-macrometer eqondile ye-β-D iyunithi yeglucose exhunywe yi-alcohol (1,4). Ngenxa yokuvuselelwa kwayo, i-biodegradable, i-biocompatibility, ucwaningo lwe-cellulose luyakhula Uma kubhekwa kakhulu. I-Cellulose iphinde isetshenziswe njengenhlanganisela yokusebenza kokubona, kagesi, kazibuthe, kanye ne-catalytic njengeqembu elisemthethweni le-alkyr oxygen ligand. I-Y.OKAMOTO nabahlanganyeli bafunde ukuhlolwa kokulungiselela kanye nezinhlelo zokusebenza eziqukethe ama-polymer ion ensimbi yensimbi ayivelakancane. Baqaphela ukuthi i-CMC/TB ehambisana nekhompuyutha ine-fluorescent eyindilinga ehlukanisayo eqinile. I-CMC, MC, kanye ne-HEC, njenge-cellulose ebaluleke kakhulu futhi esetshenziswa kabanzi i-cellulose yamanzi -i-soluble cellulose, bathole ukunakwa okukhulu ngenxa yokusebenza kwabo okuhle kwe-solubility kanye nenani elikhulu lesicelo, ikakhulukazi ubuchwepheshe bokulebula nge-fluorescent Isakhiwo se-cellulose kusixazululo samanzi kakhulu ngempumelelo.

Lesi sihloko sibika uchungechunge lwe-water-soluble cellulose ether, okungukuthi ukulungiswa, isakhiwo kanye nezakhiwo ze-fluorescent ezakhiwe yi-matomoid eyakhiwe yi-CMC, i-MC ne-HEC ne-EU (III).

2. Isivivinyo

2.1 Izinto zokuhlola

I-CMC (degree of substitution (DS) ithi 0.67, 0.89, 1.2, 2.4) futhi i-HEC ihlinzekwa ngomusa i-KIMA CHEMICAL CO.,LTD.

MC (DP=450, viscosity 350~550mpa·s) ikhiqizwa yi-KIMA CHEMICAL CO.,LTD. I-Eu2O3 (AR) ikhiqizwa i-Shanghai Yuelong Chemical Factory.

2.2 Ukulungiswa kwezinkimbinkimbi ze-CMC (HEC, MC) /Eu(III)

EuCl3·Isixazululo se-6H2O (isixazululo A): ncibilikisa ama-Eu2Os ngo-1:1 (isilinganiso sevolumu) HCI futhi uhlambulule sibe ngu-4. 94X 10-2 mol/L.

Isistimu yesimo esiqinile esiyinkimbinkimbi ye-CMC/Eu(III): Chaza u-0.0853g we-CMC ngama-DS ahlukile emanzini, bese wengeza ubuningi be-Eu(III) dropwise kusixazululo sayo esinamanzi, ukuze isilinganiso sesisindo se-CMC:Eu(III) sibe ngu-19: 1. Gqugquzela, i-reflux amahora angu-24, i-rotary ihwamuke ibe yomile, vala ukoma, gaya ube yimpuphu ngodaka lwe-agate.

I-CMC (HEC, MC/Eu(III) uhlelo lwesisombululo samanzi: Thatha isampula engu-0.0853 g ye-CMC (noma i-HEC noma i-MC)) bese uyincibilikisa ku-H2O, bese wengeza amanani ahlukene esixazululo A (ukuze ulungiselele inkimbinkimbi ye-Eu(III) ehlukile ye-Concentration ), ishukunyiswe, ishisa ukuze i-reflux, ithuthele esilinganisweni esithile se-volumetric flask, yengeze amanzi a-distilled ukuze ihlanjululwe uphawu.

2.3 I-Fluorescence spectra yezakhiwo ze-CMC (HEC, MC) /Eu(III)

Wonke amasistimu amanzi ayinkimbinkimbi akalwe nge-RF-540 fluorescence spectrophotometer (Shimadzu, Japan). Isistimu ye-solid state ye-CMC/Eu(III) ikalwe nge-Hitachi MPE-4 fluorescence spectrometer.

2.4 I-Fourier iguqula i-infrared spectroscopy ye-CMC (HEC, MC) /Eu(III)complexes

I-FTIR IR yendawo eyinkimbinkimbi yaqiniswa nge-Aralect RFX-65AFTIR futhi yacindezelwa kumathebulethi e-KBR.

3. Imiphumela Nezingxoxo

3.1 Ukwakhiwa nokwakheka kwezakhiwo ze-CMC (HEC, MC) /Eu(III).

Ngenxa yokusebenzisana kwe-electrostatic, i-CMC isesixazululweni se-aqueous dilute, futhi ibanga phakathi kwamaketanga e-CMC amangqamuzana likude, futhi amandla ahlangene abuthaka. Lapho i-Eu(III) yengezwa ngokuhla kancane esixazululweni, amaketanga e-CMC amangqamuzana esixazululweni Izakhiwo ezihambisanayo ziyashintshwa zonke, ibhalansi ye-electrostatic yesisombululo sokuqala iyashabalala, futhi iketango lamangqamuzana e-CMC livame ukugoqa. Lapho i-Eu(III) ihlangana neqembu le-carboxyl ku-CMC, indawo yokuhlangana ayihleliwe (1:16), Ngakho-ke, kwisisombululo esinamanzi esincibilikayo, i-Eu(III) ne-CMC zixhunyaniswa ngokungahleliwe neqembu le-carboxyl ochungechungeni, futhi lokhu kuhlangana okungahleliwe phakathi kwe-Eu(III) kanye namaketanga emolekyuli e-CMC akulungile ekukhishweni kwe-fluorescence okuqinile, ngoba Kwenza ingxenye yesimo se-chiral inyamalale. Lapho isisombululo sishisiswa, ukunyakaza kwamaketanga e-CMC kuyashesha, futhi ibanga phakathi kwamaketanga e-CMC amangqamuzana liyafinyezwa. Ngalesi sikhathi, ukuhlangana phakathi kwe-Eu(III) namaqembu e-carboxyl phakathi kwamaketanga e-CMC yamangqamuzana kulula ukwenzeka.

Lokhu kubophezela kuqinisekiswa ku-spectrum ye-CMC/Eu(III) FTIR. Uma kuqhathaniswa amajika (e) kanye no-(f), isiqongo esingu-1631cm-1 ku-curve (f) siba buthakathaka ku-(e), futhi iziqongo ezintsha ezimbili ezingu-1409 kanye no-1565cm-1 zivela ku-curve (e), okuyi-COO - Base vs kanye vas, okungukuthi, i-CMC/Eu(III) iwusawoti, futhi i-CMC ne-Eu(III) ziboshwe kakhulu ngamabhondi e-ionic. Ku-curve (f), ukuphakama kwe-1112cm-1 okwenziwe ukumuncwa kwesakhiwo se-aliphatic ether kanye nenani elibanzi lokumuncwa ku-1056cm-1 okubangelwa ukwakheka kwe-acetal kanye ne-hydroxyl kuncishisiwe ngenxa yokwakheka kwama-complexes, futhi kuvela iziqongo ezinhle. . Ama-electron epheya awodwa e-athomu ye-O ku-C3-O kanye nama-electron epheya awodwa e-athomu ye-O ku-ether awazange abambe iqhaza ekuxhumaneni.

Uma kuqhathaniswa namajika (a) kanye no-(b), kungabonakala ukuthi amabhande e-MC ku-MC/Eu(III), kungakhathaliseki ukuthi umoya-mpilo oseqenjini le-methoxyl noma umoya-mpilo oseringini ye-glucose engenahydrous, ashintsha, okubonisa. ukuthi ku-MC Wonke ama-oxygen abandakanyeka ekusebenzisaneni ne-Eu(III).

3.2 I-Fluorescence spectra ye-CMC (HEC, MC)/Eu(III) izakhiwo kanye nezici zazo ezinomthelela

3.2.1 I-Fluorescence spectra yezakhiwo ze-CMC (HEC, MC) /Eu(III)

Njengoba amangqamuzana amanzi esebenza ngokucisha i-fluorescence, amandla okukhishwa kwama-ion e-hydrated lanthanide ngokuvamile abuthakathaka. Lapho ama-ion e-Eu(III) ehlanganiswa ne-ether ye-cellulose encibilika emanzini, ikakhulukazi ngama-molecule e-CMC ye-polyelectrolyte, ingxenye noma wonke ama-molecule amanzi ahlanganisiwe angakhishwa, futhi amandla okukhishwa kwe-Eu(III) azothuthukiswa ngenxa yalokho. I-spectra ekhishwayo yalezi zakhiwo zonke iqukethe i-5D0→I-7F2 inguquko kagesi ye-dipole ye-Eu(III) ion, ekhiqiza inani eliphakeme ku-618nm.

3.2.2 Izinto ezithinta izakhiwo ze-fluorescence ze-CMC (HEC, MC) /Eu(III) complexes

Izici ze-cellulose ethers zithinta ukuqina kwe-fluorescence, isibonelo, izakhiwo ze-CMC/Eu(III) ezakhiwe ama-DS ahlukene zinezakhiwo ezihlukile ze-fluorescence. Uma i-DS ye-CMC ingeyena u-0.89, i-spectrum ye-fluorescence ye-complex ye-CMC/Eu(III) inenani eliphakeme kuphela elingu-618nm, kodwa lapho i-DS ye-CMC ingu-0.89, phakathi kwebanga lokuhlola kwethu, i-CMC/Eu eqinile ( III) III) Kukhona iziqongo ezimbili zokukhishwa ezibuthakathaka ku-spectrum emission, ziyi-magnetic dipole transition 5D0→7F1 (583nm) kanye nenguquko kagesi ye-dipole 5D0→7F3 (652nm). Ngaphezu kwalokho, amandla e-fluorescence alezi zinkimbinkimbi nawo ahlukile. Kuleli phepha, ukushuba kokukhipha kwe-Eu(III) ku-615nm kwakhiwe ngokumelene ne-DS ye-CMC. Uma i-DS ye-CMC=0.89, amandla okukhanya e-solid state CMC/Eu(III) afinyelela umkhawulo. Kodwa-ke, i-viscosity (DV) ye-CMC ayinawo umthelela ekushubeni kwe-fluorescence yezakhiwo ngaphakathi kobubanzi balolu cwaningo.

4 Isiphetho

Imiphumela engenhla iqinisekisa ngokucacile ukuthi izingxube ze-cellulose ether/Eu(III) ezincibilika emanzini zinezimo zokuphuma kwe-fluorescence. I-spectra ekhishwayo yalezi zinkimbinkimbi iqukethe inguquko kagesi ye-dipole ye-Eu(III), futhi ukuphakama okungu-615nm kubangelwa Ikhiqizwe yi-5D0.→Inguquko ye-7F2, imvelo ye-cellulose ether nokuqukethwe kwe-Eu(III) kungathinta ukuqina kwe-fluorescence.