Transition Dipole Moments of One-Dimensional Excitons in Soluble Phthalocyanine Thin Films

2021 ◽  
Author(s):  
Libin Liang ◽  
KimNgan Burrill ◽  
Madalina I. Furis
Keyword(s):  
Thin Films ◽  
Dipole Moments ◽  
Transition Dipole ◽  
One Dimensional ◽  
Transition Dipole Moments

scholarly journals Optical and morphological properties of thin films of bis-pyrenyl π-conjugated molecules

2016 ◽  
Vol 18 (7) ◽  
pp. 5299-5305 ◽  
Author(s):  
Tony Lelaidier ◽  
Tobias Lünskens ◽  
Alexander von Weber ◽  
Thomas Leoni ◽  
Alain Ranguis ◽  
...  
Keyword(s):  
Thin Films ◽  
Dipole Moments ◽  
Morphological Properties ◽  
Transition Dipole ◽  
Conjugated Molecules ◽  
Transition Dipole Moments

s-CRD spectra of ultra thin bis-pyrene layers showing a shoulder due to interacting transition dipole moments in adjacent layers.

scholarly journals Highly effective organic light-emitting diodes containing thermally activated delayed fluorescence emitters with horizontal molecular orientation

RSC Advances ◽  
2020 ◽  
Vol 10 (70) ◽  
pp. 42897-42902
Author(s):  
Chan Hee Lee ◽  
Shin Hyung Choi ◽  
Sung Joon Oh ◽  
Jun Hyeon Lee ◽  
Jae Won Shim ◽  
...  
Keyword(s):  
Dipole Moments ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Host Matrix ◽  
Transition Dipole ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Transition Dipole Moments

The linear D–A–D type of molecular structure of AcPYM and PxPYM enhances the horizontally oriented alignment and up to 87% of the horizontal transition dipole moments in the host matrix is realized.

scholarly journals A Unified Model to Explain the Large Chiroptical Effects in Polymer Systems Through Natural Optical Activity

2020 ◽  
Author(s):  
Jess Wade ◽  
James Hilfiker ◽  
Jochen Brandt ◽  
Letizia Liirò-Peluso ◽  
Li Wan ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Activity ◽  
High Performance ◽  
Dipole Moments ◽  
Magnetic Transition ◽  
Polymer Thin Films ◽  
Device Fabrication ◽  
Local Order ◽  
Transition Dipole ◽  
Technological Advances

<div><div><div><p>Polymer thin films that emit and absorb circularly polarised light have been demonstrated with the promise of achieving important technological advances; from efficient, high-performance displays, to 3D imaging and all-organic spintronic devices. However, the origin of the large chiroptical effects in such films has, until now, remained elusive. We investigate the emergence of such phenomena in achiral polymers blended with a chiral small-molecule additive (1-aza[6]helicene) and intrinsically chiral-sidechain polymers using a combination of spectroscopic methods and structural probes. We show that – under conditions relevant for device fabrication – the large chiroptical effects are caused by coupling of electric and magnetic transition dipole moments (natural optical activity), not structural chirality as previously assumed, and may occur because of local order in a cylinder blue phase-type organisation. This disruptive mechanistic insight into chiral polymer thin films will offer new approaches towards chiroptical materials development after almost three decades of research in this area.</p></div></div></div>

scholarly journals Directionality of light absorption and emission in representative fluorescent proteins

2020 ◽  
Vol 117 (51) ◽  
pp. 32395-32401
Author(s):  
Jitka Myšková ◽  
Olga Rybakova ◽  
Jiří Brynda ◽  
Petro Khoroshyy ◽  
Alexey Bondar ◽  
...  
Keyword(s):  
Light Wave ◽  
Fluorescent Proteins ◽  
Dipole Moments ◽  
Biological Processes ◽  
Transition Dipole ◽  
X Ray ◽  
Emission Transition ◽  
Transition Dipole Moments ◽  
Fluorescent Molecules ◽  
Incoming Light

Fluorescent molecules are like antennas: The rate at which they absorb light depends on their orientation with respect to the incoming light wave, and the apparent intensity of their emission depends on their orientation with respect to the observer. However, the directions along which the most important fluorescent molecules in biology, fluorescent proteins (FPs), absorb and emit light are generally not known. Our optical and X-ray investigations of FP crystals have now allowed us to determine the molecular orientations of the excitation and emission transition dipole moments in the FPs mTurquoise2, eGFP, and mCherry, and the photoconvertible FP mEos4b. Our results will allow using FP directionality in studies of molecular and biological processes, but also in development of novel bioengineering and bioelectronics applications.

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