Solvent dielectric relaxation properties and the external heavy atom effect in the time-resolved fluorescence quenching of anthracene by potassium lodide and potassium thiocyanate in methanol and ethanol

1992 ◽  
Vol 88 (20) ◽  
pp. 3001 ◽  
Author(s):  
Marek Mac ◽  
Jan Najbar ◽  
David Phillips ◽  
Trevor A. Smith
Keyword(s):  
Fluorescence Quenching ◽  
Dielectric Relaxation ◽  
Heavy Atom ◽  
Potassium Thiocyanate ◽  
Time Resolved Fluorescence ◽  
Time Resolved ◽  
Relaxation Properties ◽  
Heavy Atom Effect ◽  
Dielectric Relaxation Properties ◽  
Atom Effect

The Intra-annular Internal Heavy-atom Effect on the Fluorescence and Phosphorescence Properties of Oxygen, Sulphur or Selenium Containing Heterocyclic Systems Related to Dibenzo [b,n] perylene

1989 ◽  
Vol 44 (11) ◽  
pp. 1116-1118 ◽  
Author(s):  
M. Zander
Keyword(s):  
Fluorescence Quenching ◽  
Heavy Atom ◽  
Quantum Yields ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Coupling Constant ◽  
Heavy Atom Effect ◽  
Fluorescence Quantum Yields ◽  
Atom Effect ◽  
Fluorescence And Phosphorescence

Fluorescence and phosphorescence properties of dibenzo [2,3:10,11] perylo [1,12-bcd] furan (1), dibenzo [2,3:10,11] perylo [1,12-bcd] thiophene (2), and dibenzo [2,3:10,11 ] perylo [1,12-bcd] selenophene (3) have been studied. Fluorescence quantum yields as well as phosphorescence lifetimes correlate linearly with where ck are the Hückel AO coefficients in the HOMO of the parent carbocyclic system dibenzo [b, n] perylene (4) on carbon centres k to which the hetero-atom is bound, and ζ is the spin-orbit coupling constant of the heavy-atom present. The half-value concentration of fluorescence quenching (quencher: methyl iodide) of 1 - 3 increases with increasing strength of the internal heavy-atom effect present

scholarly journals Switchable organoplatinum metallacycles with high quantum yields and tunable fluorescence wavelengths

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Jun-Long Zhu ◽  
Lin Xu ◽  
Yuan-Yuan Ren ◽  
Ying Zhang ◽  
Xi Liu ◽  
...  
Keyword(s):  
Biological Sciences ◽  
Fluorescence Quenching ◽  
Materials Science ◽  
Heavy Atom ◽  
Quantum Yields ◽  
Heavy Atom Effect ◽  
Fluorescence Quantum Yields ◽  
Supramolecular Coordination ◽  
High Fluorescence ◽  
Atom Effect

Abstract The preparation of fluorescent discrete supramolecular coordination complexes (SCCs) has attracted considerable attention within the fields of supramolecular chemistry, materials science, and biological sciences. However, many challenges remain. For instance, fluorescence quenching often occurs due to the heavy-atom effect arising from the Pt(II)-based building block in Pt-based SCCs. Moreover, relatively few methods exist for tuning of the emission wavelength of discrete SCCs. Thus, it is still challenging to construct discrete SCCs with high fluorescence quantum yields and tunable fluorescence wavelengths. Here we report nine organoplatinum fluorescent metallacycles that exhibit high fluorescence quantum yields and tunable fluorescence wavelengths through simple regulation of their photoinduced electron transfer (PET) and intramolecular charge transfer (ICT) properties. Moreover, 3D fluorescent films and fluorescent inks for inkjet printing were fabricated using these metallacycles. This work provides a strategy to solve the fluorescence quenching problem arising from the heavy-atom effect of Pt(II), and offers an alternative approach to tune the emission wavelengths of discrete SCCs in the same solvent.

Thermal energy assisted heavy atom effect: fluorescence quenching of 9-cyanoanthracene in the supercritical fluid of Xe

1996 ◽  
Vol 257 (1-2) ◽  
pp. 175-180 ◽  
Author(s):  
Makoto Maeda ◽  
Urs Graf ◽  
Hiromichi Niikura ◽  
Masami Okamoto ◽  
Satoshi Hirayama
Keyword(s):  
Fluorescence Quenching ◽  
Supercritical Fluid ◽  
Thermal Energy ◽  
Heavy Atom ◽  
Heavy Atom Effect ◽  
Atom Effect

Achieving high singlet-oxygen generation by applying the heavy-atom effect to thermally activated delayed fluorescent materials

2021 ◽  
Author(s):  
Ya-Fang Xiao ◽  
Jia-Xiong Chen ◽  
Wen-Cheng Chen ◽  
Xiuli Zheng ◽  
Chen Cao ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Heavy Atom ◽  
Synergetic Effect ◽  
Heavy Atom Effect ◽  
Oxygen Generation ◽  
Thermally Activated ◽  
Singlet Oxygen Generation ◽  
Fluorescent Materials ◽  
Atom Effect

Applying the heavy-atom effect to TADF photosensitizers achieves ultra-high 1O2 generation (ФΔ = 0.91) by the synergetic effect of small ΔEST and considerable SOC.

Enhancement of Reverse Intersystem Crossing in Charge‐Transfer Molecule through Internal Heavy Atom Effect

2021 ◽  
pp. 2104646
Author(s):  
Hyung Suk Kim ◽  
Ja Yeon Lee ◽  
Seongjun Shin ◽  
Wonkyo Jeong ◽  
Sang Hoon Lee ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Heavy Atom ◽  
Intersystem Crossing ◽  
Heavy Atom Effect ◽  
Atom Effect
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