scholarly journals Reductive Amination Reaction for the Functionalization of Cellulose Nanocrystals

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 5032
Author(s):  
Omar Hassan Hassan Omar ◽  
Rosa Giannelli ◽  
Erica Colaprico ◽  
Laura Capodieci ◽  
Francesco Babudri ◽  
...  
Keyword(s):  
Cellulose Nanocrystals ◽  
Reductive Amination ◽  
Photophysical Properties ◽  
New Materials ◽  
Light Emitting ◽  
Emission Profile ◽  
Organic Light ◽  
Amination Reaction ◽  
Functionalized Materials

Cellulose nanocrystals (CNCs) represent intriguing biopolymeric nanocrystalline materials, that are biocompatible, sustainable and renewable, can be chemically functionalized and are endowed with exceptional mechanical properties. Recently, studies have been performed to prepare CNCs with extraordinary photophysical properties, also by means of their functionalization with organic light-emitting fluorophores. In this paper, we used the reductive amination reaction to chemically bind 4-(1-pyrenyl)butanamine selectively to the reducing termini of sulfated or neutral CNCs (S_CNC and N_CNC) obtained from sulfuric acid or hydrochloric acid hydrolysis. The functionalization reaction is simple and straightforward, and it induces the appearance of the typical pyrene emission profile in the functionalized materials. After a characterization of the new materials performed by ATR-FTIR and fluorescence spectroscopies, we demonstrate luminescence quenching of the decorated N_CNC by copper (II) sulfate, hypothesizing for these new functionalized materials an application in water purification technologies.

scholarly journals Characterization of Photophysical Properties of D−π−A−π−D Type Diketopyrrolopyrrole Based Molecules for Organic Light-Emitting diodes and Organic Solar Cells

2019 ◽  
Author(s):  
Ruifa Jin ◽  
Xiaofei Zhang ◽  
Wenmin Xiao
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Light Emitting Diodes ◽  
Photophysical Properties ◽  
Organic Light Emitting Diodes ◽  
Excited Singlet ◽  
Light Emitting ◽  
Organic Light ◽  
Ground State Geometry

A series of D–π–A diketopyrrolopyrrole (DPP)-based small molecules have been designed for organic light-emitting diodes (OLEDs) and organic solar cells (OSCs) applications. Appling the PBE0/6-31G(d,p) method, the ground state geometry and relevant electronic properties were investigated. The first excited singlet state geometry and the absorption and fluorescent spectra were simulated at the TD-PBE0/6-31G(d,p) level. The calculated results reveal that the photophysical properties are affected through the introduction of different end groups. Furthermore, the electronic transitions corresponding to absorption and emission exhibit intramolecular charge transfer feature. It was disclosed that the designed molecules act not only as luminescent for OLEDs, but also donor materials in OSCs. Moreover, they also can be used as potential electron transfer materials using for OLEDs and OSCs.

Rhenium(i) terpyridine complexes – synthesis, photophysical properties and application in organic light emitting devices

2016 ◽  
Vol 45 (4) ◽  
pp. 1746-1762 ◽  
Author(s):  
Tomasz Klemens ◽  
Anna Świtlicka-Olszewska ◽  
Barbara Machura ◽  
Marzena Grucela ◽  
Ewa Schab-Balcerzak ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices

The structural and photophysical characterization of new Re(i) complexes was reported.

Fabrication and Characterization of Blue Organic Light-emitting Diodes

2011 ◽  
Author(s):  
Merric Srour ◽  
Richard Fu ◽  
Steven Blomquist ◽  
Jianmin Shi ◽  
Eric Forsythe ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Fabrication And Characterization

Electrical characterization of organic light-emitting diodes using dipotassium phthalate as n-type dopant

2008 ◽  
Vol 93 (8) ◽  
pp. 083505 ◽  
Author(s):  
Meng-Huan Ho ◽  
Ming-Ta Hsieh ◽  
Teng-Ming Chen ◽  
Jenn-Fang Chen ◽  
Shiao-Wen Hwang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Electrical Characterization ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light

Modeling and Characterization of Organic Light-Emitting Diodes Including Capacitance Effect

2015 ◽  
Vol 62 (10) ◽  
pp. 3314-3321 ◽  
Author(s):  
Vitor C. Bender ◽  
Norton D. Barth ◽  
Fernanda B. Mendes ◽  
Rafael A. Pinto ◽  
J. Marcos Alonso ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Capacitance Effect
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