Brasil
| Otro
Room temperature visible/infrared emission and energy transfer in Nd3+-based organic/inorganic hybrids
| dc.contributor | Universidade Estadual Paulista (UNESP) | |
| dc.creator | Sá Ferreira, R. A. | |
| dc.creator | Carlos, L. D. | |
| dc.creator | De Zea Bermudez, V. | |
| dc.creator | Molina, C. | |
| dc.creator | Dahmouche, K. | |
| dc.creator | Messaddeq, Younes | |
| dc.creator | Ribeiro, Sidney José Lima | |
| dc.date | 2014-05-27T11:20:35Z | |
| dc.date | 2016-10-25T18:18:21Z | |
| dc.date | 2014-05-27T11:20:35Z | |
| dc.date | 2016-10-25T18:18:21Z | |
| dc.date | 2003-01-01 | |
| dc.date.accessioned | 2017-04-06T01:04:40Z | |
| dc.date.available | 2017-04-06T01:04:40Z | |
| dc.identifier | Journal of Sol-Gel Science and Technology, v. 26, n. 1-3, p. 315-319, 2003. | |
| dc.identifier | 0928-0707 | |
| dc.identifier | http://hdl.handle.net/11449/67157 | |
| dc.identifier | http://acervodigital.unesp.br/handle/11449/67157 | |
| dc.identifier | 10.1023/A:1020784006933 | |
| dc.identifier | WOS:000178789100056 | |
| dc.identifier | 2-s2.0-0037267475 | |
| dc.identifier | http://dx.doi.org/10.1023/A:1020784006933 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/888642 | |
| dc.description | The photoluminescence features and the energy transfer processes of Nd3+-based siloxanepoly(oxyethylene) hybrids are reported. The host matrix of these materials, classed as di-ureasils, is formed by a siloxane backbone covalently bonded to polyether chains of two molecular weights by means of urea cross-links. The room-temperature photoluminescence spectra of these xerogels show a wide broad purple-blue-green band (350-570 nm), associated with the emitting centres of the di-ureasil host, and the typical near infrared emission of Nd3+ (700-1400 nm), assigned to the 4F3/2 → 4I9/2,11/2,13/2 transitions. Self-absorptions in the visible range, resonant with intra-4f3 transitions, indicate the existence of an energy conversion mechanism of visible di-ureasil emission into near infrared Nd3+ luminescence. The existence of energy transfer between the di-ureasil's emitting centres and the Nd3+ ions is demonstrated calculating the lifetimes of these emitting centres. The efficiency of that energy transfer changes both with the polymer molecular weight and the Nd3+ concentration. | |
| dc.language | eng | |
| dc.relation | Journal of Sol-Gel Science and Technology | |
| dc.rights | info:eu-repo/semantics/closedAccess | |
| dc.subject | Di-ureasils | |
| dc.subject | Energy transfer | |
| dc.subject | Luminescence | |
| dc.subject | Neodymium triflate | |
| dc.subject | Crosslinking | |
| dc.subject | Neodymium compounds | |
| dc.subject | Photoluminescence | |
| dc.subject | Polyethers | |
| dc.subject | Silicon compounds | |
| dc.subject | Thermal effects | |
| dc.subject | Urea | |
| dc.subject | Optical amplification | |
| dc.subject | Sol-gels | |
| dc.title | Room temperature visible/infrared emission and energy transfer in Nd3+-based organic/inorganic hybrids | |
| dc.type | Otro |