Fluorinated lanthanide complexes : new NIR-VIS upconversion systems

Lanthanide-based upconversion is a well-known process in solids, but for a wide variety of applications small size, preferentially molecular size upconversion emitters are required. Using inorganic upconversion nanoparticles solves some of the problems, however, the luminescence is severely quenched...

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Main Author: Bogdanov, Viktor
Other Authors: Xiong Qihua
Format: Theses and Dissertations
Language:English
Published: 2018
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Online Access:http://hdl.handle.net/10356/73085
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-730852023-02-28T23:59:10Z Fluorinated lanthanide complexes : new NIR-VIS upconversion systems Bogdanov, Viktor Xiong Qihua School of Physical and Mathematical Sciences DRNTU::Science::Physics::Optics and light Lanthanide-based upconversion is a well-known process in solids, but for a wide variety of applications small size, preferentially molecular size upconversion emitters are required. Using inorganic upconversion nanoparticles solves some of the problems, however, the luminescence is severely quenched for smaller particle sizes. On the other hand, organic lanthanide complexes provide better overall luminosities and can be easily modified for medical applications, but rarely provide adequate quantum yield of NIR emission to enable upconversion processes. This work was aimed to realize conventional for inorganic systems Yb-Tb/Er upconversion in the perfluorinated organic complex and study its mechanism in order to explore the limits of the system and evaluate the perspective pathway. Green Yb-Tb upconversion by cooperative energy transfer (CET) mechanism was realized in vacuum, and green/red Yb-Er upconversion by energy transfer (ETU) mechanism was shown to be possible in ambient conditions for organic complex powder. Energy transfer pathways were studied in detail to explain features of the mechanisms, such as three-photon red upconversion for the latter case. Based on this data the conclusion about the perspectives is drawn and the outlook of the future work in the field is provided. Master of Science 2018-01-02T06:30:35Z 2018-01-02T06:30:35Z 2018 Thesis Bogdanov, V. (2018). Fluorinated lanthanide complexes : new NIR-VIS upconversion systems. Master's thesis, Nanyang Technological University, Singapore. http://hdl.handle.net/10356/73085 10.32657/10356/73085 en 47 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Science::Physics::Optics and light
spellingShingle DRNTU::Science::Physics::Optics and light
Bogdanov, Viktor
Fluorinated lanthanide complexes : new NIR-VIS upconversion systems
description Lanthanide-based upconversion is a well-known process in solids, but for a wide variety of applications small size, preferentially molecular size upconversion emitters are required. Using inorganic upconversion nanoparticles solves some of the problems, however, the luminescence is severely quenched for smaller particle sizes. On the other hand, organic lanthanide complexes provide better overall luminosities and can be easily modified for medical applications, but rarely provide adequate quantum yield of NIR emission to enable upconversion processes. This work was aimed to realize conventional for inorganic systems Yb-Tb/Er upconversion in the perfluorinated organic complex and study its mechanism in order to explore the limits of the system and evaluate the perspective pathway. Green Yb-Tb upconversion by cooperative energy transfer (CET) mechanism was realized in vacuum, and green/red Yb-Er upconversion by energy transfer (ETU) mechanism was shown to be possible in ambient conditions for organic complex powder. Energy transfer pathways were studied in detail to explain features of the mechanisms, such as three-photon red upconversion for the latter case. Based on this data the conclusion about the perspectives is drawn and the outlook of the future work in the field is provided.
author2 Xiong Qihua
author_facet Xiong Qihua
Bogdanov, Viktor
format Theses and Dissertations
author Bogdanov, Viktor
author_sort Bogdanov, Viktor
title Fluorinated lanthanide complexes : new NIR-VIS upconversion systems
title_short Fluorinated lanthanide complexes : new NIR-VIS upconversion systems
title_full Fluorinated lanthanide complexes : new NIR-VIS upconversion systems
title_fullStr Fluorinated lanthanide complexes : new NIR-VIS upconversion systems
title_full_unstemmed Fluorinated lanthanide complexes : new NIR-VIS upconversion systems
title_sort fluorinated lanthanide complexes : new nir-vis upconversion systems
publishDate 2018
url http://hdl.handle.net/10356/73085
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