Te(Ⅳ)-I--RhB水溶液中纳米粒子的形成及其光谱效应

doi:10.7517/j.issn.1674-0475.2005.02.144

影像科学与光化学 ›› 2005, Vol. 23 ›› Issue (2): 144-150.DOI: 10.7517/j.issn.1674-0475.2005.02.144

Te(Ⅳ)-I^--RhB水溶液中纳米粒子的形成及其光谱效应

陈填烽¹, 郑文杰¹, 杨芳¹, 白燕¹, 黄耀熊²

1. 暨南大学, 化学系, 广东, 广州, 510632;
2. 暨南大学, 生物医学工程系, 广东, 广州, 510632

收稿日期:2004-10-18 修回日期:2004-11-08 出版日期:2005-03-23 发布日期:2005-03-23
通讯作者: 郑文杰,tzhwj@jnu.edu.cn.
基金资助:
国家自然科学基金资助项目(20271022);广东省自然科学基金资助项目(010369).

Formation of Te(Ⅳ)-I^--RhB Nanoparticles in Liquid Phase and Its Spectral Properties

CHEN Tian-feng¹, ZHENG Wen-jie¹, YANG Fang¹, BAI Yan¹, HUANG Yao-xiong²

1. Department of Chemistry, Jinan University, Guangzhou 510632, Guangdong, P.R.China;
2. Department of Biomedical Engineering, Jinan University, Guangzhou 510632, Guangdong, P.R.China

Received:2004-10-18 Revised:2004-11-08 Online:2005-03-23 Published:2005-03-23

摘要/Abstract

摘要： 用激光散射 (LLS)及透射电镜 (TEM)技术研究了Te(Ⅳ)-I^--RhB水溶液中液相纳米粒子在自然状态下的聚集行为及粒径分布,并用共振瑞利散射光谱、荧光发射光谱、紫外-可见光谱对该液相纳米体系的光谱性质进行了表征.结果表明:在0.8mol/LHCl介质中,当Te(Ⅳ)浓度为4、8、12、16、20μg/L时,Te(Ⅳ)-I^--RhB体系平均粒径分别为192、228、262、278、300nm;纳米粒子的形成及其聚合行为导致RhB在558nm处的吸收峰(A₅₅₈)的减色效应及598nm处的发射峰(F₅₉₈)的荧光猝灭和623nm处的共振散射峰 (I₆₂₃)增强,并与Te(Ⅳ)浓度呈良好的线性关系;体系在623nm处的散射强度I^1/3与其粒径成正比.用等离子体原子发射光谱(ICP)、元素分析(EA)等手段对该纳米粒子进行表征,确定了其最简分子式为(RhB)₄(TeI₈).

关键词: 碲, 罗丹明B, 液相纳米粒子, 激光散射, 光谱效应

Abstract: The resonance scattering (RS), fluorescence, adsorption spectra and mean diameters of Te(Ⅳ)-I^--RhB liquid phase nanoparticles under different conditions were studied. The results show that fluorescence quenching and enhancement of RS intensity were obviously observed due to the formation of [(RhB)₄(TeI₈)]_n nanoparticles. Their average diameters increased with the concentration of Te(Ⅳ) in the range of 0-20 μg/L. The maximum resonance scattering peak was at 623 nm. The cube root of I_{623 nm/623 nm} was proportional to the average diameter of the nanoparticles. The nanoparticles were characterized by ICP-AES, EA. The results indicate that the molecular formula was (RhB)₄ (TeI₈).

Key words: Te, RhB, liquid phase nanoparticles, laser light scattering, spectral properties

中图分类号:

陈填烽, 郑文杰, 杨芳, 白燕, 黄耀熊. Te(Ⅳ)-I^--RhB水溶液中纳米粒子的形成及其光谱效应[J]. 影像科学与光化学, 2005, 23(2): 144-150.

CHEN Tian-feng, ZHENG Wen-jie, YANG Fang, BAI Yan, HUANG Yao-xiong. Formation of Te(Ⅳ)-I^--RhB Nanoparticles in Liquid Phase and Its Spectral Properties[J]. Imaging Science and Photochemistry, 2005, 23(2): 144-150.

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Te(Ⅳ)-I^--RhB水溶液中纳米粒子的形成及其光谱效应

Formation of Te(Ⅳ)-I^--RhB Nanoparticles in Liquid Phase and Its Spectral Properties

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Te(Ⅳ)-I--RhB水溶液中纳米粒子的形成及其光谱效应

Formation of Te(Ⅳ)-I--RhB Nanoparticles in Liquid Phase and Its Spectral Properties

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Te(Ⅳ)-I^--RhB水溶液中纳米粒子的形成及其光谱效应

Formation of Te(Ⅳ)-I^--RhB Nanoparticles in Liquid Phase and Its Spectral Properties