Self assembling of emissive nano-metal compounds induced by small organic compounds

2015 Fiscal Year Final Research Report

• Project/Area Number: 24350063
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Functional materials chemistry
• Research Institution: Hokkaido University
• Principal Investigator: Konishi Katsuaki 北海道大学, 地球環境科学研究科(研究院), 教授 (80234798)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: クラスター / 発光 / 分子認識 / センサー / 自己集積

Outline of Final Research Achievements

In this work, we studied the optical properties of water-soluble luminescent cadmium chalcogenide clusters coated by hydrophilic poly(ethylene glycol) (PEG) units. Through the study on electronic absorption and photoluminescence spectra of a series of Cd10Se4(SR)10 clusters bearing directly-attached PEG units of various chain lengths, we showed that the surrounding PEG environments can electronically affect the properties of the inorganic core. Typically, the absorption bands exhibit a continuous blue shift as the increase of the PEG chain length. The chain length dependencies were also observed in the photoluminescence properties, particularly in the excitation spectra. We also studied the aggregation-induced emission enhancement of the clusters, and found that the direct-type PEG-modified clusters form aggregates upon treatment with lipophilic phenols through weak non-bonding interaction, showing notable emission enhancement in aqueous media.

Free Research Field

配位化学