Luminescence switching of CdTe quantum dots in presence of water-soluble spironaphthoxazine.
The typical reaction of spironaphthoxazine is the conversion between the non-polar spiro form and polar merocyanine form. Quantum dots (QDs) have unique optical properties and several advantages over conventional organic dyes. In this work, the CdTe QDs containing a water-soluble spironaphthoxazine was used as the optical probe photoisomerization between spiro and merocyanine. The initial bright fluorescence of CdTe QDs was effectively quenched by water-soluble spironaphthoxazine using UV irradiation. Reversible modulation of fluorescence intensity of CdTe QDs was achieved using alternating irradiation with UV and visible light. The possible mechanism is discussed.
BK21 FTIT Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, Daejeon 305-764, Republic of Korea.
Eun-Mi
EM
Lee
Seon-Young
SY
Gwon
Young-A
YA
Son
Sung-Hoon
SH
Kim
D000042:Absorption; D019187:Cadmium Compounds / Q000737:chemistry*; D049449:Luminescence; D010078:Oxazines / Q000737:chemistry* / Q000528:radiation effects*; D045663:Quantum Dots; D012995:Solubility; D013050:Spectrometry, Fluorescence; D013141:Spiro Compounds / Q000737:chemistry* / Q000528:radiation effects*; D013691:Tellurium / Q000737:chemistry*; D013696:Temperature; D014466:Ultraviolet Rays; D014867:Water / Q000737:chemistry*
D019187:Cadmium Compounds; D010078:Oxazines; D013141:Spiro Compounds; C560447:spironaphthoxazine; D014867:Water; D013691:Tellurium; C028337:cadmium telluride