ʻO ka synthesis a me nā hiʻohiʻona kukui o ka wai -soluble cellulose ether / EU (III)

ʻO ka wai synthetic -soluble cellulose ether/EU (III) me ka hana luminous, ʻo ia hoʻi, carboxymethyl cellulose (CMC)/EU (III), methyl cellulose (MC)/EU (III), a me Hydroxyeyl cellulose (HEC)/EU (III) kūkākūkā i ke ʻano o kēia mau paʻakikī a ua hōʻoia ʻia e FTIR. ʻO ka spectrum hoʻomaka o kēia mau mea i hoʻohālikelike ʻia ʻo EU (III) ma 615nm. Ka hoʻololi papeti uila (e 5D0→7F2). Hoʻopili ke pani o CMC i ka spectrum fluorescent a me ka ikaika o CMC/EU (III). Hoʻopili pū ka ʻike EU (III) i ka ikaika fluorescent o ka paʻakikī. Ke loaʻa ka ʻike o ka EU (III) i ka 5% (mass ratio), ʻo ka ikaika fluorescent o kēia wai -soluble cellulose ether EU (III) pāʻani i hiki i ka palena kiʻekiʻe.

Hua'ōlelo: wai -soluble cellulose ether; Eu (III); kūlike; ʻālohilohi

1.Hoʻolauna

ʻO ka cellulose kahi macrometer laina o kaβ-D ʻāpana glucose i hoʻopili ʻia e ka (1,4) waiʻona. Ma muli o kāna mea hou, biodegradable, biocompatibility, ke hoʻonui nei ke aʻo ʻana i ka cellulose ʻO ka nui o ka nānā ʻana. Hoʻohana ʻia ʻo Cellulose ma ke ʻano he hui o ka optical, uila, magnetic, a me catalytic hana ma ke ʻano he ligand oxygen alkyr o ka hui lehulehu. Ua aʻo ʻo Y.OKAMOTO a me nā hoa hana i nā hoʻokolohua hoʻomākaukau a me nā noi i loaʻa nā polymers ion metala honua. Ua ʻike lākou i ka CMC/TB i hoʻohālikelike ʻia i ka compuer he ikaika polarizing fluorescent. CMC, MC, a me HEC, e like me ka mea nui a hoʻohana nui ʻia ka wai cellulose -soluble cellulose, ua loaʻa ka manaʻo nui ma muli o kā lākou hana solubility maikaʻi a me ka waiwai noi nui, ʻoi aku ka ʻenehana hōʻailona fluorescent ʻO ke ʻano o ka cellulose i loko o ka wai wai. pono.

Hōʻike kēia ʻatikala i kahi ʻano o ka wai -soluble cellulose ether, ʻo ia hoʻi ka hoʻomākaukau ʻana, ka hale a me nā waiwai fluorescent i hana ʻia e ka matomoid i hana ʻia e CMC, MC a me HEC a me EU (III).

2. Hoao

2.1 Mea hoʻokolohua

ʻO CMC (degree of substitution (DS) he 0.67, 0.89, 1.2, 2.4) a hāʻawi ʻia ʻo HEC e KIMA CHEMICAL CO.,LTD.

MC (DP=450, viscosity 350~550mpa·s) hana ʻia e KIMA CHEMICAL CO.,LTD. Hana ʻia ʻo Eu2O3 (AR) e Shanghai Yuelong Chemical Factory.

2.2 Hoʻomākaukau i nā CMC (HEC, MC) /Eu (III) paʻakikī

EuCl3·6H2O solution (solution A): e hoʻoheheʻe i nā Eu2Os ma 1:1 (ratio ka nui) HCI a hoʻoheheʻe i 4. 94X 10-2 mol/L.

CMC/Eu(III) ʻōnaehana paʻa paʻakikī: Hoʻoheheʻe i ka 0.0853g o CMC me nā DS ʻokoʻa i ka wai, a laila e hoʻohui i ka helu Eu(III) dropwise i kona ʻano wai, no laila ʻo ka lakio nui o CMC: Eu(III) he 19: 1. E hoʻoulu, reflux no 24 mau hola, e hoʻoheheʻe ʻia i ka maloʻo, maloʻo maloʻo, e wili i ka pauka me ka mortar agate.

CMC (HEC, MC/Eu(III) ʻōnaehana hoʻonā wai: E lawe i 0.0853 g o CMC (a i ʻole HEC a i ʻole MC)) laʻana a hoʻoheheʻe iā ia i H2O, a laila hoʻohui i nā huina like ʻole o ka hopena A (e hoʻomākaukau i ka paʻakikī Eu(III) ʻokoʻa. ), hoʻoulu ʻia, wela i ka reflux, hoʻoneʻe ʻia i kahi nui o ka ipu volumetric, hoʻohui i ka wai distilled e hoʻoheheʻe i ka māka.

3

Ua ana ʻia nā ʻōnaehana wai paʻakikī me RF-540 fluorescence spectrophotometer (Shimadzu, Iapana). Ua ana 'ia ka CMC/Eu(III) me ka Hitachi MPE-4 fluorescence spectrometer.

2.4 Hoʻololi ʻo Fourier i nā kikoʻī infrared o CMC (HEC, MC) /Eu(III) paʻakikī

Ua hoʻopaʻa ʻia ka FTIR IR o ka complex me Aralect RFX-65AFTIR a kaomi ʻia i nā papa KBr.

3. Nā hopena a me ke kūkākūkā

3.1 Ka hoʻokumu ʻana a me ka hoʻolālā ʻana o CMC (HEC, MC) /Eu(III) paʻakikī

Ma muli o ka pilina electrostatic, CMC i loko o ke kaulike i loko o ka dilute aqueous solution, a me ka mamao ma waena o ka CMC molecular kaulahao ua mamao loa, a me ka ikaika like ole nawaliwali. Ke hoʻohui ʻia ʻo Eu(III) i ka dropwise i loko o ka hopena, nā kaulahao mole CMC i loko o ka hopena Ua hoʻololi ʻia nā waiwai conformational, ua luku ʻia ke koena electrostatic o ka hoʻonā mua, a ʻo ke kaulahao mole CMC e hoʻopili ʻia. I ka hui 'ana o Eu(III) me ka hui carboxyl i CMC, 'o ke kūlana ho'opa'a 'ana he 'ano ma'amau (1:16), No laila, i loko o ka dilute aqueous solution, Eu(III) a me CMC i hui 'ole me ka hui carboxyl i ke kaulahao, a. ʻAʻole maikaʻi kēia hoʻopaʻa ʻana ma waena o Eu (III) a me CMC molecular kaulahao no ka hoʻokuʻu ʻana o ka fluorescence ikaika, no ka mea, nalo ka ʻāpana o ke kūlana chiral. Ke hoʻomehanaʻia ka hopena, ua wikiwiki ka neʻeʻana o nā kaulahao mole CMC, a ua pōkole ka mamao ma waena o nā kaulahao mole CMC. I kēia manawa, maʻalahi ka hoʻopaʻa ʻana ma waena o Eu(III) a me nā hui carboxyl ma waena o nā kaulahao mole CMC.

Hoʻopaʻa ʻia kēia hoʻopaʻa ʻana i ka spectrum CMC/Eu(III) FTIR. I ka hoʻohālikelike ʻana i nā pihi (e) a me (f), nāwaliwali ka piko 1631cm-1 ma ka ʻaʻe (f) ma (e), a ʻelua mau piko hou 1409 a me 1565cm-1 i hōʻike ʻia ma ka pihi (e), he COO - Base vs a vas, ʻo ia hoʻi, ʻo CMC/Eu(III) he mea paʻakai, a ʻo CMC a me Eu(III) i hoʻopaʻa nui ʻia e nā mea paʻa ionic. Ma ka pihi (f), ka 1112cm-1 peak i hana ʻia e ka absorption o ka aliphatic ether structure a me ka laulā absorption peak ma 1056cm-1 i kumu ʻia e ka acetal structure a me ka hydroxyl ua hōʻemi ʻia ma muli o ka hoʻokumu ʻana o nā paʻakikī, a ʻike ʻia nā piko maikaʻi. . ʻAʻole i komo nā ʻelua pālua o ka ʻĀtoma O ma C3-O a me nā ʻelua pālua o ka ʻO atom i ka etera i ka hoʻonohonoho ʻana.

I ka hoʻohālikelike ʻana i nā pihi (a) a me (b), hiki ke ʻike ʻia ʻo nā kaula o MC ma MC/Eu(III), inā ʻo ia ka oxygen i loko o ka hui methoxyl a i ʻole ka oxygen i loko o ke apo glucose anhydrous, e hoʻololi, e hōʻike ana. i loko o MC Hoʻopili ʻia nā oxygen a pau me ka Eu(III).

3.2 Fluorescence spectra o CMC (HEC, MC) /Eu(III) complexes a me ko lakou mau mea hooikaika.

3.2.1 ʻO nā ʻano kikoʻī o ka fluorescence o CMC (HEC, MC) /Eu(III) paʻakikī

No ka mea, ʻo nā molekala wai he mau mea hoʻopiʻi fluorescence, ʻoi aku ka nāwaliwali o ka hoʻokuʻu ʻana o nā ion lanthanide hydrated. Ke hui pū ʻia nā ion Eu(III) me ka cellulose ether e hiki ke hoʻoheheʻe ʻia i ka wai, ʻoi aku ka nui me nā molekele CMC polyelectrolyte, hiki ke hoʻokaʻawale ʻia kahi hapa a i ʻole nā ​​​​mea āpau o ka wai i hui pū ʻia, a e hoʻonui ʻia ka ikaika o ka hoʻokuʻu ʻana o Eu (III). Loaʻa ka 5D0 i ka spectra emission o kēia mau complexes→7F2 uila dipole hoʻololi o Eu(III) ion, e hoʻopuka i ka piko ma 618nm.

3.2.2 Nā mea e pili ana i nā waiwai fluorescence o nā paʻakikī CMC (HEC, MC) /Eu(III)

Hoʻopili nā waiwai o ka cellulose ethers i ka ikaika o ka fluorescence, no ka laʻana, ʻo nā complexes CMC/Eu(III) i hoʻokumu ʻia e nā DS ʻokoʻa he mau waiwai fluorescence like ʻole. Inā ʻaʻole 0.89 ka DS o CMC, ʻo ka fluorescence spectrum o ka paʻakikī o CMC/Eu(III) he piko wale nō ma 618nm, akā i ka 0.89 ka DS o CMC, i loko o ka laulā o kā mākou hoʻokolohua, paʻa CMC/Eu ( III) III) ʻElua mau puʻupuʻu hoʻokuʻu nāwaliwali i ka spectrum emission, ʻo ia ka hoʻololi dipole magnetic 5D0→7F1 (583nm) a me ka hoʻololi dipole uila 5D0→7F3 (652nm). Eia kekahi, ʻokoʻa ka ikaika o ka fluorescence o kēia mau complexes. Ma kēia pepa, ua hoʻolālā ʻia ka ikaika hoʻokuʻu o Eu(III) ma 615nm e kūʻē i ka DS o CMC. Ke hiki i ka DS o CMC=0.89, hiki i ka ikaika māmā o ka moku'āina paʻa CMC/Eu(III) i ka palena kiʻekiʻe. Eia nō naʻe, ʻaʻohe hopena o ka viscosity (DV) o CMC i ka ikaika fluorescence o nā paʻakikī i loko o ke ʻano o kēia haʻawina.

4 Ka hopena

ʻO nā hualoaʻa ma luna aʻe nei e hōʻoiaʻiʻo maopopo ana i ka paʻakikī o ka wai-soluble cellulose ether/Eu(III) he mau waiwai hoʻoheheʻe fluorescence. Loaʻa i ka spectra emission o kēia mau complexes ka hoʻololi dipole uila o Eu(III), a ʻo ka piko ma 615nm ke kumu i hana ʻia e ka 5D0→ʻO ka hoʻololi 7F2, ke ʻano o ka cellulose ether a me ka ʻike o Eu(III) hiki ke hoʻopili i ka ikaika fluorescence.