Njikọ na luminous e ji mara mmiri -soluble cellulose ether/EU (III)

Mmiri sịntetik -soluble cellulose ether / EU (III) na luminous arụmọrụ, ya bụ, carboxymethyl cellulose (CMC) / EU (III), methyl cellulose (MC) / EU (III), na Hydroxyeyl cellulose (HEC) / EU (III) na-atụle nhazi nke mgbagwoju ndị a ma kwadoro ya site na FTIR. Ụdị mmalite nke ihe ndị a dakọtara bụ EU (III) na 615nm. Mgbanwe nwa nkịta eletrik (site na 5D0→7F2). Ndochi nke CMC na-emetụta ụdị dị iche iche nke fluorescent na ike nke CMC/EU (III). Ọdịnaya EU (III) na-emetụtakwa ike fluorescent nke mgbagwoju anya. Mgbe ọdịnaya EU (III) bụ 5% (oke oke), ike fluorescent nke mmiri a -soluble cellulose ether EU (III) matches ruru kacha.

Okwu: mmiri - ether cellulose soluble; EU (III); dakọtara; na-egbuke egbuke

1.Okwu mmalite

Cellulose bụ nnukwu macrometer nke eririβ-D nkeji glucose jikọtara ya na mmanya (1,4). N'ihi mmeghari ohuru ya, biodegradable, biocompatibility, ọmụmụ nke cellulose na-abawanye Ka a na-elekwu anya. A na-ejikwa cellulose mee ihe dị ka ngwakọta nke ngwa anya, eletriki, magnetik, na arụmọrụ catalytic dị ka otu multi-officicial group alkyr oxygen ligand. Y.OKAMOTO na ndị na-arụkọ ọrụ amụwo ule nkwadebe na ngwa nwere polymers metal ion na-adịghị ahụkebe. Ha chọpụtara na kọmpụta CMC/TB dakọtara nwere fluorescent gbara gburugburu. CMC, MC, na HEC, dị ka ihe kasị mkpa na ọtụtụ ebe na-eji cellulose mmiri -soluble cellulose, enwetawo nnukwu nlebara anya n'ihi na ha ọma solubility arụmọrụ na nnukwu ngwa uru, karịsịa fluorescent labeling technology Ọdịdị nke cellulose na aqueous ngwọta bụ nnọọ. dị irè.

Isiokwu a na-akọ usoro nke mmiri -soluble cellulose ether, ya bụ nkwadebe, Ọdịdị na fluorescent Njirimara kpụrụ site matomoid kpụrụ site CMC, MC na HEC na EU (III).

2. Nnwale

2.1 Ihe nnwale

CMC (ọkwa nke nnọchi (DS) bụ 0.67, 0.89, 1.2, 2.4) na HEC bụ nke KIMA ChemICAL CO., LTD nyere.

MC (DP=450, viscosity 350~550mpa·s) bụ KIMA ChemICAL CO.,LTD mepụtara. Eu2O3 (AR) bụ nke Shanghai Yuelong Chemical Factory na-emepụta.

2.2 Nkwadebe nke CMC (HEC, MC) /Eu (III) mgbagwoju

EuCl3·6H2O ngwọta (ngwọta A): igbari Eu2Os na 1: 1 (olu ruru) HCI na itughari ka 4. 94X 10-2 mol/L.

CMC/Eu(III) siri ike steeti usoro: igbari 0.0853g nke CMC dị iche iche DS na mmiri, wee tinye quantitative Eu (III) dropwise ya aqueous ngwọta, nke mere na uka ruru nke CMC:Eu (III) bụ 19: 1. Nwuo, reflux maka awa 24, rotary evaporate ka nkụ, agụụ nkụ, Mike ka ntụ ntụ na agate ngwa agha.

CMC (HEC, MC / Eu (III) usoro mmiri mmiri: Were 0.0853 g nke CMC (ma ọ bụ HEC ma ọ bụ MC)) sample na igbari ya na H2O, tinyezie iche iche ichekwa nke ngwọta A (iji kwadebe dị iche iche Eu (III) Concentration complexion. ), na-akpali akpali, na-ekpo ọkụ na reflux, na-akwaga na ụfọdụ ego nke volumetric flask, gbakwunyere mmiri distilled ka ọ na-atụgharị na akara ahụ.

2.3 Fluorescence ụdịdị nke CMC (HEC, MC) / EU (III) ogige.

Eji RF-540 fluorescence spectrophotometer tụọ sistemu mmiri dị mgbagwoju anya (Shimadzu, Japan). A tụrụ usoro steeti siri ike nke CMC/Eu(III) jiri ihe nlere anya ọkụ Hitachi MPE-4.

2.4 Fourier mgbanwe infrared spectroscopy nke CMC (HEC, MC) / EU (III) mgbagwoju

Ejiri Aralect RFX-65AFTIR gbakwunyere FTIR IR nke ogige ahụ wee pịa ya na mbadamba KBr.

3. Nsonaazụ na mkparịta ụka

3.1 Nhazi na nhazi nke ogige CMC (HEC, MC) / EU (III)

N'ihi mmekọrịta electrostatic, CMC nọ na nha nha na ngwọta mmiri na-agbaze, na anya dị n'etiti ụdọ molekụla CMC dị anya, na ike mmekọrịta adịghị ike. Mgbe Eu (III) na-agbakwunyere dropwise n'ime ngwọta, CMC molecular chains na ngwọta The conformational Njirimara na-agbanwe niile, electrostatic itule nke mbụ ngwọta na-ebibi, na CMC molekul yinye na-achọ curls. Mgbe Eu (III) jikọtara ya na otu carboxyl dị na CMC, ọnọdụ njikọ ahụ bụ random (1:16), Ya mere, na ngwọta mmiri dị nro, Eu (III) na CMC na-ejikọta ya na otu carboxyl na yinye, na Nke a random bonding n'etiti Eu (III) na CMC molekul chains adịghị mma maka ike fluorescence emission, n'ihi na ọ na-eme ka akụkụ nke chiral ọnọdụ na-apụ n'anya. Mgbe ngwọta ahụ na-ekpo ọkụ, a na-eme ka mmegharị nke agbụ molecular CMC dịkwuo ngwa ngwa, na anya dị n'etiti CMC molecular chains na-ebelata. N'oge a, njikọ dị n'etiti Eu (III) na otu carboxyl dị n'etiti agbụ molecular CMC dị mfe ime.

Ekwenyere njikọ a na ụdịdị CMC/Eu(III) FTIR. N'ịtụle akụkụ (e) na (f), 1631cm-1 ọnụ ọgụgụ kasị elu na usoro (f) na-ada mbà na (e), na elu abụọ ọhụrụ 1409 na 1565cm-1 pụtara na usoro (e), nke bụ COO - Base vs na vas, ya bụ, CMC/Eu(III) bụ ihe nnu, na CMC na Eu(III) na-ejikarị njikọ ion. N'ime usoro (f), ọnụ ọgụgụ 1112cm-1 nke e guzobere site na ntinye nke usoro ether aliphatic na nnukwu absorption elu na 1056cm-1 nke ihe nhazi acetal na hydroxyl na-ebelata n'ihi nhazi nke mgbagwoju anya, na ọnụ ọgụgụ dị mma na-apụta. . Otu ụzọ elektrọn nke O atom dị na C3-O na otu ụzọ eletrọn nke O atom dị na ether esoghị na nhazi ahụ.

N'iji atụnyere akụkụ (a) na (b), enwere ike ịhụ na eriri nke MC na MC / Eu (III), ma ọ bụ oxygen na otu metoxyl ma ọ bụ ikuku oxygen na mgbanaka glucose anhydrous, na-agbanwe, nke na-egosi. na na MC oxygen niile na-etinye aka na nhazi na EU (III).

3.2 Fluorescence spectra nke CMC (HEC, MC) / Eu (III) mgbagwoju na ihe ndị na-emetụta ha.

3.2.1 Fluorescence ụdịdị nke CMC (HEC, MC) / EU (III) ogige

Ebe ọ bụ na ụmụ irighiri mmiri na-emenyụ ọkụ fluorescence dị irè, ike ikuku nke ion lanthanide hydrated na-esikarị ike. Mgbe ion Eu (III) na-ejikọta ya na cellulose ether soluble mmiri, karịsịa na polyelectrolyte CMC molecules, a ga-ewepụ akụkụ ma ọ bụ ihe niile nke mmiri mmiri a na-ahazi, a ga-eme ka mmụba nke Eu (III) dịkwuo elu n'ihi ya. Esemokwu dị n'ikuku nke ụlọ ndị a niile nwere 5D0→7F2 eletriki dipole mgbanwe nke Eu(III) ion, nke na-emepụta ọnụ ọgụgụ kasị elu na 618nm.

3.2.2 Ihe na-emetụta fluorescence Njirimara nke CMC (HEC, MC) / EU (III) ụlọ.

Ngwongwo nke cellulose ethers na-emetụta ike nke fluorescence, dịka ọmụmaatụ, mgbagwoju CMC / Eu (III) nke DS dị iche iche mere nwere ihe dị iche iche nke fluorescence. Mgbe DS nke CMC abụghị 0.89, fluorescence ụdịdị dị iche iche nke mgbagwoju nke CMC / Eu (III) nwere ọnụ ọgụgụ kasị elu na 618nm, ma mgbe DS nke CMC bụ 0.89, n'ime nso nke anyị nnwale, siri ike CMC / Eu ( III) III) Enwere ọnụ elu ikuku abụọ na-esighị ike na ụdị ikuku dị iche iche, ha bụ ntụgharị magnetik dipole 5D0→7F1 (583nm) na mgbanwe dipole eletriki 5D0→7F3 (652nm). Tụkwasị na nke ahụ, ike ọkụ nke fluorescence nke ụlọ ndị a dịkwa iche. N'akwụkwọ a, a kpara nkata ike nke Eu (III) na 615nm megide DS nke CMC. Mgbe DS nke CMC = 0.89, ọkụ ọkụ nke steeti CMC/Eu(III) siri ike ruru kacha. Otú ọ dị, viscosity (DV) nke CMC enweghị mmetụta na fluorescence ike nke mgbagwoju n'ime oke nke ọmụmụ a.

4 Nkwubi okwu

Nsonaazụ dị n'elu na-akwado n'ụzọ doro anya na ogige nke cellulose ether / Eu (III) na-edozi mmiri nwere ihe ndị na-emepụta ihe. Ihe ngosi ikuku nke ogige ndị a nwere mgbanwe elektrọn dipole nke Eu(III), na ọnụ ọgụgụ kacha elu na 615nm bụ nke 5D0 mepụtara.→7F2 mgbanwe, ọdịdị nke cellulose ether na ọdịnaya nke Eu (III) nwere ike imetụta fluorescence ike.