Orientation of transition dipole moments of rhodamine 6G determined by excited state absorption

Penzkofer, Alfons; Wiedmann, J.

doi:10.1016/0030-4018(80)90364-8

Cited by 53 publications

(35 citation statements)

References 19 publications

(24 reference statements)

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“…The probe molecule was pumped from S 0 to S 1 state 21 and has dipole moments parallel to the longitudinal direction of the molecule as well as similar intensities 22 . The fluorescence was measured as a function of the R6G concentration.…”

Section: Methodsmentioning

confidence: 99%

Intermolecular Alignment Dependence of Ethylene Glycol Flow on the Chemical Nature of the Solid Surface (Borosilicate and SnO2)

Quintella¹,

Gonçalves²,

Pepe³

et al. 2001

J. Braz. Chem. Soc.

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Este trabalho estuda o fluxo de etileno glicol (MEG) sobre duas superfícies sólidas com constituições químicas diferentes: borossilicato e dióxido de estanho (SnO 2 ). O alinhamento intermolecular, determinado como polarização e anisotropia, mostrou dependência da natureza química do sólido. A razão entre as tensões interfaciais dinâmicas foi 1.09 ± 0.07, devendo ser maior para MEG/borossilicato do que para MEG/SnO 2 . A razão da capilaridade foi 0.92 ± 0.06, sendo menor para MEG/borossilicato. Medidas estáticas do ângulo de contato mostraram valores menores para borossilicato do que para SnO 2 . Os mapas de polarização e anisotropia apresentaram valores mais altos para MEG/SnO 2 , o que pode ser explicado pela alta tensão interfacial do MEG/borossilicato. Estes resultados são compatíveis com interações de volume mais fortes em MEG/SnO 2 e com contribuições de superfície mais fortes em MEG/borossilicato. Isto pode ser atribuído ao borossilicato ser mais eletronegativo, favorecendo mais as pontes de hidrogênio com o MEG.This work studied ethylene glycol (MEG) flowing on two different solid surfaces, borosilicate and thin dioxide (SnO 2 ). Intermolecular alignment, determined as polarization and anisotropy, showed dependence on the solid chemical nature. The ratio between dynamic surface tensions was found 1.09 ± 0.07, being stronger for MEG/borosilicate than for MEG/SnO 2 . The capillary ratio found was 0.92 ± 0.06, being smaller for MEG/borosilicate. Static contact angle measurements gave lower values for borosilicate than for SnO 2 . Both polarization and anisotropy maps presented higher values for MEG/SnO 2 , which can be explained by MEG/borosilicate higher interfacial interaction. The results obtained are compatible with stronger bulk phenomena for MEG/SnO 2 and with stronger interfacial phenomena for MEG/borosilicate. This may be due to borosilicate being more electronegative, yielding more efficiently hydrogen bonds with MEG.

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Section: Methodsmentioning

confidence: 99%

Intermolecular Alignment Dependence of Ethylene Glycol Flow on the Chemical Nature of the Solid Surface (Borosilicate and SnO2)

Quintella¹,

Gonçalves²,

Pepe³

et al. 2001

J. Braz. Chem. Soc.

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show abstract

“…Important parameters that determine optical properties of the molecules are the magnitude and alignment of the electronic transition dipole moments [30,31]. These parameters can be obtained from ESA and absorption anisotropy spectra [32,33] using the same pump-probe laser techniques described above (see Fig. 9).…”

Section: Excited-state Absorption and Anisotropy Properties Of Fluorementioning

confidence: 99%

Two-photon Absorbing Photonic Materials: From Fundamentals to Applications

Belfield

Yao

Bondar

2008

Advances in Polymer Science

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“…It has transition dipole moment parallel to the molecule longitudinal direction [24] and was pumped from state S 0 to S 1 [25]. The concentration of 1:9 £ 10 ¡3 mol l ¡1 was chosen to maximize the signal and avoid quenching processes due to excitation migration like Fo« ster transfer [26].…”

Section: Applicationmentioning

confidence: 99%

Automated system to acquire fluorescence, polarization and anisotropy maps within liquid flows

Quintella¹,

Gonçalves²,

Pepe³

et al. 2002

Journal of Automated Methods & Management in Chemistry

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Orientation of transition dipole moments of rhodamine 6G determined by excited state absorption

Cited by 53 publications

References 19 publications

Intermolecular Alignment Dependence of Ethylene Glycol Flow on the Chemical Nature of the Solid Surface (Borosilicate and SnO2)

Intermolecular Alignment Dependence of Ethylene Glycol Flow on the Chemical Nature of the Solid Surface (Borosilicate and SnO2)

Two-photon Absorbing Photonic Materials: From Fundamentals to Applications

Automated system to acquire fluorescence, polarization and anisotropy maps within liquid flows

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