光谱学与光谱分析
光譜學與光譜分析
광보학여광보분석
SPECTROSCOPY AND SPECTRAL ANALYSIS
2010年
1期
13-17
,共5页
聚(2-甲氧基-5-辛氧基)对苯乙炔%Y_2O_3%Eu~(3+)%纳米复合材料%光致电子转移
聚(2-甲氧基-5-辛氧基)對苯乙炔%Y_2O_3%Eu~(3+)%納米複閤材料%光緻電子轉移
취(2-갑양기-5-신양기)대분을결%Y_2O_3%Eu~(3+)%납미복합재료%광치전자전이
Poly(2-methoxy-5-octyloxy)-p-phenylene vinylene%Y_2Q_3%Eu~(3+)%Nano-composites%Photo-induced electron transfer
采用原位脱氯化氢缩合聚合法制备了聚(2-甲氧基-5-辛氧基)对苯乙炔/Y_2O_3:Eu~(3+)(PMOCOPV/Y_2O_3:Eu~(3+))纳米复合材料.红外光谱证实了在Y_2O_3:Eu~(3+)表面的包覆层为PMOCOPV.紫外-可见吸收光谱表明与PMOCOPV相比,PMOICOPV/Y_2O_3:Eu~(3+)的最大吸收峰发生红移且强度提高.荧光光谱研究表明PMOCOPV/Y_2O_3:Eu~(3+)的最大发射波长发生红移且强度提高,荧光寿命得到增强,Y_2O_3:Eu~(3+)与PMOCOPV之间形成了光致电子转移体系,使得π电子离域程度增加.并且导致荧光量子效率提高.根据E_g与入射光子能量hv的关系,拟合了PMOCOPV/Y_2O_3:Eu~(3+)薄膜的光学禁带宽度,发现E_g减小.采用简并四波混频方法测试它们的三阶非线性极化率χ~((3)),结果发现与PMOCOPV相比,PMOCOPV/Y_2O_3:Eu~(3+)纳米复合体的非线性光学响应逐渐增强,进一步说明PMOCOPV与Y_2O_3:Eu~(3+)之间形成了分子间光致电子转移体系,产生了复杂的分子间离π电子非线性运动. MOCOPV 间形成了光致电子转移体系,使得π电子离域程度增加.并且导致荧光量子效率提高.根据E_g与入射光子能量hv的关系,拟合了PMOCOPV/Y_2O_3:Eu~(3+)薄膜的光学禁带宽度,发现E_g减小.采用简并四波混频方法测试它们的三阶非线性极化率X~((3)),结果发现与PMOCOPV相比,PMOCOPV/Y_2O_3:Eu~(3+)纳米复合体的非线性光学响应逐渐增强,进一步说明PMOCOPV与Y_2O_3:Eu~(3+)之间形成了分子间光致电子转移体系,产生了复杂的分子间离π电子非线性运动. MOC
採用原位脫氯化氫縮閤聚閤法製備瞭聚(2-甲氧基-5-辛氧基)對苯乙炔/Y_2O_3:Eu~(3+)(PMOCOPV/Y_2O_3:Eu~(3+))納米複閤材料.紅外光譜證實瞭在Y_2O_3:Eu~(3+)錶麵的包覆層為PMOCOPV.紫外-可見吸收光譜錶明與PMOCOPV相比,PMOICOPV/Y_2O_3:Eu~(3+)的最大吸收峰髮生紅移且彊度提高.熒光光譜研究錶明PMOCOPV/Y_2O_3:Eu~(3+)的最大髮射波長髮生紅移且彊度提高,熒光壽命得到增彊,Y_2O_3:Eu~(3+)與PMOCOPV之間形成瞭光緻電子轉移體繫,使得π電子離域程度增加.併且導緻熒光量子效率提高.根據E_g與入射光子能量hv的關繫,擬閤瞭PMOCOPV/Y_2O_3:Eu~(3+)薄膜的光學禁帶寬度,髮現E_g減小.採用簡併四波混頻方法測試它們的三階非線性極化率χ~((3)),結果髮現與PMOCOPV相比,PMOCOPV/Y_2O_3:Eu~(3+)納米複閤體的非線性光學響應逐漸增彊,進一步說明PMOCOPV與Y_2O_3:Eu~(3+)之間形成瞭分子間光緻電子轉移體繫,產生瞭複雜的分子間離π電子非線性運動. MOCOPV 間形成瞭光緻電子轉移體繫,使得π電子離域程度增加.併且導緻熒光量子效率提高.根據E_g與入射光子能量hv的關繫,擬閤瞭PMOCOPV/Y_2O_3:Eu~(3+)薄膜的光學禁帶寬度,髮現E_g減小.採用簡併四波混頻方法測試它們的三階非線性極化率X~((3)),結果髮現與PMOCOPV相比,PMOCOPV/Y_2O_3:Eu~(3+)納米複閤體的非線性光學響應逐漸增彊,進一步說明PMOCOPV與Y_2O_3:Eu~(3+)之間形成瞭分子間光緻電子轉移體繫,產生瞭複雜的分子間離π電子非線性運動. MOC
채용원위탈록화경축합취합법제비료취(2-갑양기-5-신양기)대분을결/Y_2O_3:Eu~(3+)(PMOCOPV/Y_2O_3:Eu~(3+))납미복합재료.홍외광보증실료재Y_2O_3:Eu~(3+)표면적포복층위PMOCOPV.자외-가견흡수광보표명여PMOCOPV상비,PMOICOPV/Y_2O_3:Eu~(3+)적최대흡수봉발생홍이차강도제고.형광광보연구표명PMOCOPV/Y_2O_3:Eu~(3+)적최대발사파장발생홍이차강도제고,형광수명득도증강,Y_2O_3:Eu~(3+)여PMOCOPV지간형성료광치전자전이체계,사득π전자리역정도증가.병차도치형광양자효솔제고.근거E_g여입사광자능량hv적관계,의합료PMOCOPV/Y_2O_3:Eu~(3+)박막적광학금대관도,발현E_g감소.채용간병사파혼빈방법측시타문적삼계비선성겁화솔χ~((3)),결과발현여PMOCOPV상비,PMOCOPV/Y_2O_3:Eu~(3+)납미복합체적비선성광학향응축점증강,진일보설명PMOCOPV여Y_2O_3:Eu~(3+)지간형성료분자간광치전자전이체계,산생료복잡적분자간리π전자비선성운동. MOCOPV 간형성료광치전자전이체계,사득π전자리역정도증가.병차도치형광양자효솔제고.근거E_g여입사광자능량hv적관계,의합료PMOCOPV/Y_2O_3:Eu~(3+)박막적광학금대관도,발현E_g감소.채용간병사파혼빈방법측시타문적삼계비선성겁화솔X~((3)),결과발현여PMOCOPV상비,PMOCOPV/Y_2O_3:Eu~(3+)납미복합체적비선성광학향응축점증강,진일보설명PMOCOPV여Y_2O_3:Eu~(3+)지간형성료분자간광치전자전이체계,산생료복잡적분자간리π전자비선성운동. MOC
The photoelectric nano-composites of poly(2-methoxy-5-octyloxy)-p-phenylene vinylene/Y_2O_3 : Eu~(3+) (PMOCOPV/ Y_2O_3 : Eu~(3+)) were prepared by dehydrochlorination in-situ polymerization. The result of Fourier transform infrared spectroscopy indicates that PMOCOPV is coated on the surface of Y_2O_3 : Eu~(3+). Compared with PMOCOPV, the absorption of PMO COPV/Y_2O_3 : Eu~(3+) is strengthened, and a red shift of the absorption peak can be clearly observed in the UV-Vis spectrum. Photoluminescence spectroscopy indicates that the maximum emission wavelength of the PMOCOPV/Y_2O_3 : Eu~(3+)is red-shifted and the intensity of photoluminescence increases in comparison with PMOCOPV. PMOCOPV/Y_2O_3 : Eu~(3+) shows fluorescence increasing, which involved the inter-molecular photo-induced charge transfer process. The optical band gap of PMOCOPV/Y_2O_3 : Eu~(3+) decreases. The third-order optical nonlinear susceptibility of PMOCOPV/Y_2O_3 : Eu~(3+) nano-composites was measured by degenerate four wave mixing. The results show that the third-order nonlinear optical responses of PMOCOPV/Y_2O_3 : Eu~(3+) nano-composites are enhanced in comparison with PMOCOPV, which can be attributed to inter-molecular photo-induced electron transfer and delocalized k electron coupling between PMOCOPV and Y_2O_3 : Eu~(3+).
