Molecular Conformational Twist Controlled Wide Fluorescence Tuning and White Light Emission in a Single Fluorophore via Halochromism

2021 ◽  
Author(s):  
Parthasarathy Gayathri ◽  
Probal Nag ◽  
Neethu Anand ◽  
Vennapusa Sivaranjana Reddy ◽  
Mehboobali Pannippara ◽  
...  
Keyword(s):  
Single Molecule ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Ph Responsive ◽  
Donor Acceptor

pH responsive fluorescence molecules are interesting candidates for achieving tunable as well as white light emission from single molecule. Herein we have synthesized pyridine integrated carbazole and triphenylamine donor-acceptor isomers,...

scholarly journals Secondary Through-Space Interactions: Achieving Single-Molecule White-Light Emission from Clusteroluminogens with Isolated Phenyl Rings

2022 ◽  
Author(s):  
Jianyu Zhang ◽  
Parvej Alam ◽  
Siwei Zhang ◽  
Hanchen Shen ◽  
Lianrui Hu ◽  
...  
Keyword(s):  
Single Molecule ◽  
White Light ◽  
Light Emission ◽  
Photophysical Properties ◽  
White Light Emission ◽  
Excitation Wavelength ◽  
Conjugated Molecules ◽  
Long Wavelength ◽  
Phenyl Rings ◽  
Donor Acceptor

Clusteroluminogens (CLgens) refer to some non-conjugated molecules that show visible light due to the formation of aggregates and unique electronic properties with through-space interactions (TSI). Although mature and systematic theories of molecular photophysics have been developed to study conventional conjugated chromophores, it is still challenging to endow CLgens with designed photophysical properties by manipulating TSI. Herein, three CLgens with non-conjugated donor-acceptor structures and different halide substituents with secondary TSI are designed and synthesized. These molecules show multiple emissions and even white-light emission in the crystalline state and the intensity ratio of these multiple emission peaks is easily manipulated by changing the halide atom and excitation wavelength. Experimental and theoretical results successfully disclose the electronic nature of these multiple emissions: through-space conjugation for short-wavelength fluorescence, through-space charge transfer based on secondary TSI for long-wavelength fluorescence, and room-temperature phosphorescence. The introduction of secondary TSI to CLgens not only enriches their varieties of photophysical properties but also inspires the establishment of novel aggregate photophysics for clusteroluminescence.

scholarly journals A novel donor–π–acceptor halochromic 2,6-distyrylnaphthalene chromophore: synthesis, photophysical properties and DFT studies

RSC Advances ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 168-176
Author(s):  
Farhad Panahi ◽  
Ali Mahmoodi ◽  
Sajjad Ghodrati ◽  
Fazlolah Eshghi
Keyword(s):  
White Light ◽  
Potential Application ◽  
High Performance ◽  
Light Emission ◽  
Photophysical Properties ◽  
White Light Emission ◽  
High Potential ◽  
Dft Studies ◽  
Ph Responsive

A new pH-responsive fluorescence chromophore with white light emission at pH = 3 was synthesized which has high potential application in the preparation of high-performance lighting devices.

Supramolecular assembly of dipeptide functionalized benzo[ghi]perylene monoimide directs white light emission via donor–acceptor interactions

RSC Advances ◽  
2015 ◽  
Vol 5 (109) ◽  
pp. 90158-90167 ◽  
Author(s):  
Manoj K. Manna ◽  
Dnyaneshwar B. Rasale ◽  
Apurba K. Das
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Self Assembly ◽  
Light Emission ◽  
Supramolecular Assembly ◽  
White Light Emission ◽  
Acid Molecule ◽  
Donor Acceptor

Optical and self-assembly nature of an aromatic dipeptide Phe-Phe (FF) functionalized benzo[ghi]perylene monoimide (BPI) are studied. Acceptor BPI-FF-OMe molecule shows white light emission upon energy transfer from donor pyrenebutyric acid molecule.

New heterometallic Ir(iii)2–Eu(iii) complexes: white light emission from a single molecule

2015 ◽  
Vol 44 (1) ◽  
pp. 37-40 ◽  
Author(s):  
Andrea Baschieri ◽  
Sara Muzzioli ◽  
Elia Matteucci ◽  
Stefano Stagni ◽  
Massimiliano Massi ◽  
...  
Keyword(s):  
Single Molecule ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Pure White

Pure white light emission from a single-molecule Ir2(iii)–Eu(iii) complex can be achieved with appropriate ligands.

Photoluminescent manipulation of phenoxazine-based molecules via regulating conformational isomerization, and the corresponding electroluminescent properties

2019 ◽  
Vol 7 (45) ◽  
pp. 14255-14263 ◽  
Author(s):  
Zong Cheng ◽  
Jixiong Liang ◽  
Zhiqiang Li ◽  
Tong Yang ◽  
Chunhui Lin ◽  
...  
Keyword(s):  
Single Molecule ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Conformational Isomerization ◽  
Isomerization Mechanism ◽  
Mechanochromic Luminescence

Systematic and detailed research on mechanochromic luminescence reveals the conformational isomerization mechanism behind single-molecule white-light emission.

Mechanically induced single-molecule white-light emission of excited-state intramolecular proton transfer (ESIPT) materials

2021 ◽  
Author(s):  
Quan Huang ◽  
Qiang Guo ◽  
Jingbo Lan ◽  
Rongchuan Su ◽  
You Ran ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Single Molecule ◽  
White Light ◽  
Light Emission ◽  
Intramolecular Proton Transfer ◽  
White Light Emission ◽  
Mechanical Grinding ◽  
Emission Color ◽  
Color Switching

Disclosed herein is the first example of a mechanically induced single-molecule white-light emission of ESIPT materials. Mechanical grinding transforms intermolecular packing motifs, enabling emission color switching from yellowish green to white.

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