High efficiency near-IR emission of Nd(III) based on low-vibrational environment in cages of nanosized zeolites [13]

Journal of the American Chemical Society

Volumn 122, Issue 35, 2000, Pages 8583-8584

  Wada, Yuji ^a   Okubo, Tatsuya ^b   Ryo, Munenori ^a   Nakazawa, Toru ^b   Hasegawa, Yasuchika ^a   Yanagida, Shozo ^a  

^a OSAKA UNIVERSITY   (Japan)

^b UNIVERSITY OF TOKYO   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

NEODYMIUM; ZEOLITE;

CHEMICAL ANALYSIS; CHEMICAL STRUCTURE; COMPLEX FORMATION; INFRARED RADIATION; LETTER; PARTICLE SIZE; SPECTROSCOPY; SYNTHESIS;

EID: 0033824749     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja0020557     Document Type: Letter

References (32)

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25. 3+ cation in the pore structure. However, the real structure of the complex formed in the zeolite pore is still in veil.
26. The preliminary investigation of Nd(PMS)-n-FAU and Nd(PMS)-FAU of the conventional size (about 1-10 mm) with neutron diffraction analysis, X-ray diffraction analysis, and solid NMR suggested the formation of the complex inside the cages. The detailed analysis of the structure is in progress.
27. A photoelectron multiplier and a Ge detector were used as a detector for the region of 400-1000 nm and 800-1500 nm, respectively.
28. 6 was degassed by freeze-pump thaw cycles and sealed in a quartz cell (optical length: 10 mm) for optical measurements. The dispersion was ultrasonicated and kept still overnight. The transparent supernatant of the dispersion was supplied for the measurements of the absorption spectra.
29. 3+. Therefore, the present success in observing the emission of the dispersion of Nd(PMS)-n-FAU should be attributed to both (1) intrinsic enhancement in the emission and (2) enhancement in the dispersibility.
30. Quantum yield was determined by the standard procedure using an integral sphere (diameter 9 cm) and a cell of optical path length, 1 mm.
31. -2) than that obtained for the dispersion solution of Nd(PMS)-nano-FAU.
32. The measurements were performed by using Q switch Nd: YAG laser, and Si photodiode (time response < Ins). Nanosecond pulse for sample excitation (λ = 532 nm, power 300 mW, diameter = 56 mm) was obtained by second harmonic generation with KDP crystal. Emission from the sample was filtered by low-cut optical filters placed in front of the detector. The response of the photodiode was monitored by a digital oscilloscope synchronized to single-pulse excitation.