Fluorescence Enhancement by Symmetry Breaking in a Twisted Triphenylene Derivative

Jack W. Levell; Arvydas Ruseckas; John B. Henry; Yi Wang; Andrew D. Stretton; Andrew R. Mount; Trent H. Galow; Ifor D. W. Samuel

doi:10.1021/jp106622n

Fluorescence Enhancement by Symmetry Breaking in a Twisted Triphenylene Derivative

Jack W. Levell, Arvydas Ruseckas, John B. Henry, Yi Wang, Andrew D. Stretton, Andrew R. Mount, Trent H. Galow, Ifor D. W. Samuel

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

1,4,5,8,9,12-Hexamethyltriphenylene (HMTP) shows a high photoluminescence quantum yield (PLQY) of 31% in the solid state, making it of interest for luminescence applications. The detailed photophysical properties of HMTP have been investigated by using time-resolved and steady-state luminescence, PLQY, and molar absorption coefficient measurements. An enhancement of the transition dipole moment for fluorescence and absorption was demonstrated compared to the case of unsubstituted triphenylene, which resulted in a 20-fold increase in the radiative decay rate. This is attributed to a breaking of triphenylene symmetry as a result of the necessarily twisted structure induced by steric crowding. In addition, it was shown that HMTP shows similar photoluminescence energies in solution, powder, and film, indicating a reduced. propensity for intermolecular pi-stacking compared to the case of triphenylene, as a result of this twisted structure. This work also develops a method for calculating the photoluminescence quantum yield of powders by using a calibrated photodiode in combination with an uncalibrated CCD spectrometer.

Original language	English
Pages (from-to)	13291-13295
Number of pages	5
Journal	Journal of Physical Chemistry A
Volume	114
Issue number	51
DOIs	https://doi.org/10.1021/jp106622n
Publication status	Published - 30 Dec 2010

Access to Document

10.1021/jp106622n

Cite this

@article{fa78458533c246288333900ee43b3820,

title = "Fluorescence Enhancement by Symmetry Breaking in a Twisted Triphenylene Derivative",

abstract = "1,4,5,8,9,12-Hexamethyltriphenylene (HMTP) shows a high photoluminescence quantum yield (PLQY) of 31% in the solid state, making it of interest for luminescence applications. The detailed photophysical properties of HMTP have been investigated by using time-resolved and steady-state luminescence, PLQY, and molar absorption coefficient measurements. An enhancement of the transition dipole moment for fluorescence and absorption was demonstrated compared to the case of unsubstituted triphenylene, which resulted in a 20-fold increase in the radiative decay rate. This is attributed to a breaking of triphenylene symmetry as a result of the necessarily twisted structure induced by steric crowding. In addition, it was shown that HMTP shows similar photoluminescence energies in solution, powder, and film, indicating a reduced. propensity for intermolecular pi-stacking compared to the case of triphenylene, as a result of this twisted structure. This work also develops a method for calculating the photoluminescence quantum yield of powders by using a calibrated photodiode in combination with an uncalibrated CCD spectrometer.",

author = "Levell, {Jack W.} and Arvydas Ruseckas and Henry, {John B.} and Yi Wang and Stretton, {Andrew D.} and Mount, {Andrew R.} and Galow, {Trent H.} and Samuel, {Ifor D. W.}",

year = "2010",

month = dec,

day = "30",

doi = "10.1021/jp106622n",

language = "English",

volume = "114",

pages = "13291--13295",

journal = "Journal of Physical Chemistry A",

issn = "1089-5639",

publisher = "American Chemical Society (ACS)",

number = "51",

}

TY - JOUR

T1 - Fluorescence Enhancement by Symmetry Breaking in a Twisted Triphenylene Derivative

AU - Levell, Jack W.

AU - Ruseckas, Arvydas

AU - Henry, John B.

AU - Wang, Yi

AU - Stretton, Andrew D.

AU - Mount, Andrew R.

AU - Galow, Trent H.

AU - Samuel, Ifor D. W.

PY - 2010/12/30

Y1 - 2010/12/30

N2 - 1,4,5,8,9,12-Hexamethyltriphenylene (HMTP) shows a high photoluminescence quantum yield (PLQY) of 31% in the solid state, making it of interest for luminescence applications. The detailed photophysical properties of HMTP have been investigated by using time-resolved and steady-state luminescence, PLQY, and molar absorption coefficient measurements. An enhancement of the transition dipole moment for fluorescence and absorption was demonstrated compared to the case of unsubstituted triphenylene, which resulted in a 20-fold increase in the radiative decay rate. This is attributed to a breaking of triphenylene symmetry as a result of the necessarily twisted structure induced by steric crowding. In addition, it was shown that HMTP shows similar photoluminescence energies in solution, powder, and film, indicating a reduced. propensity for intermolecular pi-stacking compared to the case of triphenylene, as a result of this twisted structure. This work also develops a method for calculating the photoluminescence quantum yield of powders by using a calibrated photodiode in combination with an uncalibrated CCD spectrometer.

AB - 1,4,5,8,9,12-Hexamethyltriphenylene (HMTP) shows a high photoluminescence quantum yield (PLQY) of 31% in the solid state, making it of interest for luminescence applications. The detailed photophysical properties of HMTP have been investigated by using time-resolved and steady-state luminescence, PLQY, and molar absorption coefficient measurements. An enhancement of the transition dipole moment for fluorescence and absorption was demonstrated compared to the case of unsubstituted triphenylene, which resulted in a 20-fold increase in the radiative decay rate. This is attributed to a breaking of triphenylene symmetry as a result of the necessarily twisted structure induced by steric crowding. In addition, it was shown that HMTP shows similar photoluminescence energies in solution, powder, and film, indicating a reduced. propensity for intermolecular pi-stacking compared to the case of triphenylene, as a result of this twisted structure. This work also develops a method for calculating the photoluminescence quantum yield of powders by using a calibrated photodiode in combination with an uncalibrated CCD spectrometer.

U2 - 10.1021/jp106622n

DO - 10.1021/jp106622n

M3 - Article

SN - 1089-5639

VL - 114

SP - 13291

EP - 13295

JO - Journal of Physical Chemistry A

JF - Journal of Physical Chemistry A

IS - 51

ER -

Fluorescence Enhancement by Symmetry Breaking in a Twisted Triphenylene Derivative

Abstract

Access to Document

Fingerprint

Cite this