Photophysical and theoretical studies of peripherally halogenated octaphenoxyphthalocyanines

Computational studies validated the experimental results and revealing details about the electronic structures of novel halogenated phthalocyanines. Fluorescence and singlet oxygen quantum yields analysis revealed two-dimensional heavy atom effect.

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

Chemical Communications ◽

10.1039/d0cc08323b ◽

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.

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Phosphoreszenzeigensch aften von Methyl-, Chlor- und Brom-Derivaten des [2.2] Paracyclophans

Zeitschrift für Naturforschung A ◽

10.1515/zna-1987-0921 ◽

1987 ◽

Vol 42 (9) ◽

pp. 1041-1042 ◽

Cited By ~ 3

Author(s):

H. Hopf ◽

E. Hermann

Keyword(s):

Triplet State ◽

Fluorescence Spectra ◽

Heavy Atom ◽

The Other ◽

Quantum Yields ◽

Heavy Atom Effect ◽

Chloro Derivatives ◽

Derivatives Of ◽

Atom Effect

Phosphorescence and fluorescence spectra, quantum yields of phosphorescence and fluorescence as well as phosphorescence lifetimes have been measured of six methyl-, chloro- and bromo-derivatives of [2.2] paracyclophane in ethanol at 77 K. While the chloro-derivatives as well as dibromo-paracyclophane exhibit a normal internal heavy-atom effect behaviour the momobromo-compound shows anomalies. These possibly indicate that in the monobromo-compound an additional pathway of the radiationless deactivation of the lowest triplet state is effective which does not occur with the other compounds.

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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

Zeitschrift für Naturforschung A ◽

10.1515/zna-1989-1113 ◽

1989 ◽

Vol 44 (11) ◽

pp. 1116-1118 ◽

Cited By ~ 25

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

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Zum äußeren Schweratom-Effekt der Phosphoreszenz in nicht-fluoreszierenden aromatischen Verbindungen / The External Heavy-Atom-Effect of Phosphorescence in Non-fluorescing Aromatic Compounds

Zeitschrift für Naturforschung A ◽

10.1515/zna-1973-1119 ◽

1973 ◽

Vol 28 (11) ◽

pp. 1869-1870

Author(s):

M. Zander

Keyword(s):

Triplet State ◽

Aromatic Compounds ◽

Heavy Atom ◽

Quantum Yields ◽

Naphthalene Derivatives ◽

Heavy Atom Effect ◽

Atom Effect

Phosphorescence quantum yields of six non-fluorescing naphthalene derivatives have been measured in ethanol and ethanol-ethylbromide 1:1 at 77 °K. The observed enhancement of phosphorescence yield of four of these in the heavy atom solvent is explained with the assumption that the rate of the phosphorescence transition is increased relatively to the radiationless desactivation of the triplet state.

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Switchable organoplatinum metallacycles with high quantum yields and tunable fluorescence wavelengths

Nature Communications ◽

10.1038/s41467-019-12204-7 ◽

2019 ◽

Vol 10 (1) ◽

Cited By ~ 24

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.

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