Synthesis, Characterization, Absorbance, Fluorescence and Non Linear Optical Properties of Some Donor Acceptor Chromophores

Asiri, Abdullah M.; Khan, Salman A.; Al-Amoudi, Muhammed S.; Alamry, Kalid A.; Arabia, Saudi

doi:10.5012/bkcs.2012.33.6.1900

Cited by 46 publications

(14 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 6(a) shows the absorption and emission spectra CBZDS (disulfide) and Figure 6 shows the UV-visible spectra of colloidal suspensions of gold nanoparticles coated with CBZDS which showed two characteristic absorption bands of the carbazole hetero-ring with the maxima at 330 and 344 nm attributed to the absorption by two chromophores C=C and C=N, respectively. [30,31] The same bands in the case of CBZDS-coated nanoparticles appears with little bathochromic shift at 331 and 345 nm, respectively. The broad band around 540-545 nm is attributed to the surface plasmon of the gold nanoparticles.…”

Section: Resultsmentioning

confidence: 74%

Identification of thiol from 11-(9-carbazolyl)-1-undecyl disulfide by NMR spectroscopy and single step coating of gold nanoparticles

Jadhav

Maccagno

2014

Journal of Sulfur Chemistry

View full text Add to dashboard Cite

Disulfide-functionalized fluorescent derivative of carbozole named 11-(9-carbazolyl)-1-undecyl disulfide (CBZDS) has been synthesized. Proton nuclear magnetic resonance spectroscopy was used to distinguish thiol from its corresponding symmetrical disulfide. Single step synthesis of gold nanoparticles coated with CBZDS was carried out which resulted in stable monolayers of CBZDS on gold nanoparticles.

show abstract

Section: Resultsmentioning

confidence: 74%

Identification of thiol from 11-(9-carbazolyl)-1-undecyl disulfide by NMR spectroscopy and single step coating of gold nanoparticles

Jadhav

Maccagno

2014

Journal of Sulfur Chemistry

View full text Add to dashboard Cite

show abstract

“…It has been established theoretically [61] and in two independent studies by de Silva et al [62,63] on novel charge transfer molecular systems and experimentally [64] that the total hyperpolarizabilities are inversely proportional to the energy gaps. That is, the smaller energy gaps encourage the eventuality of charge transfer, which in turn render higher NLO characters.…”

Section: Resultsmentioning

confidence: 99%

The Thermodynamic and Kinetic Properties of 2-Hydroxypyridine/2-Pyridone Tautomerization: A Theoretical and Computational Revisit

Hejazi

Osman

Al‐Youbi

et al. 2016

IJMS

View full text Add to dashboard Cite

The gas-phase thermal tautomerization reaction between 2-hydroxypyridine (2-HPY) and 2-pyridone (2-PY) was investigated by applying 6-311++G** and aug-cc-pvdz basis sets incorporated into some density functional theory (DFT) and coupled cluster with singles and doubles (CCSD) methods. The geometrical structures, dipole moments, HOMO-LUMO energy gaps, total hyperpolarizability, kinetics and thermodynamics functions were monitored against the effects of the corrections imposed on these functionals. The small experimental energy difference between the two tautomers of 3.23 kJ/mol; was a real test of the accuracy of the applied levels of theory. M062X and CCSD methods predicted the preference of 2-HPY over 2-PY by 5–9 kJ/mol; while B3LYP functional favoured 2-PY by 1–3 kJ/mol. The CAM-B3LYP and ωB97XD functionals yielded mixed results depending on the basis set used. The source of preference of 2-HPY is the minimal steric hindrance and electrostatic repulsion that subdued the huge hyperconjugation in 2-PY. A 1,3-proton shift intramolecular gas-phase tautomerization yielded a high average activation of 137.152 kJ/mol; while the intermolecular mixed dimer interconversion gave an average barrier height of 30.844 kJ/mol. These findings are boosted by a natural bond orbital (NBO) technique. The low total hyperpolarizabilities of both tautomers mark out their poor nonlinear optical (NLO) behaviour. The enhancement of the total hyperpolarizability of 2-HPY over that of 2-PY is interpreted by the bond length alternation.

show abstract

“…The carboxyl-containing CRA derivative, CRA-COOH, [29,30] and the hydroxyl-containing functional compounds, Cz-OH, [31,32] Cz-CSN-OH, [33][34][35][36][37] Cz-SN-OH, [38] Cz-MN-OH, [28,38] and Cz-CMA-OH, [39] were synthesized according to literature procedures. Their chemical structures are shown in Scheme 1 (for detailed synthesis and data analysis, see ESI †).…”

Section: Methodsmentioning

confidence: 99%

Photorefractive hyper-structured molecular glasses constructed by calix[4]resorcinarene core and carbazole-based methine nonlinear optical chromophore

Fang(

et al. 2017

Dyes and Pigments

View full text Add to dashboard Cite

Seven C-methylcalix[4]resorcinarene (CRA)-based photorefractive (PR) hyper-structured molecular glasses (HSMGs) containing carbazole-based methine nonlinear optical (NLO) chromophores were designed and synthesized via esterification between carboxyl-containing asymmetric CRA core molecule and hydroxyl-containing functional compounds. When the feed ratio of hydroxyl-containing NLO functional compounds to carboxyl groups of CRA-COOH was kept at 1.5/1 by mole, the degree of introduction of NLO chromophore to the CRA core was above 70%. All the HSMGs show low glass transition temperatures (Tg), and good solubility in common low boiling point solvents such as THF, CHCl3, etc. Powder XRD and UV-vis absorption in films of HSMGs indicate that the aggregation, packing and crystallization of the NLO chromophores in these HSMGs had been effectively reduced. Doping with Nethyl-carbazole (ECz) as a plasticizer and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) as a photosensitizer, all the HSMGs composites showed good PR effects. All the coupling gain coefficients (Γ) of HSMGs-based composites are about twice to the corresponding small molecular NLO chromophores-based composites, thanks to the decreased NLO chromophores antiparallel packing caused by the asymmetric CRA core. Among them, CRA-CSN/ECz/PCBM (69:30:1, wt.%) composite exhibited the best performance with the Γ value of 78.2 cm-1 at the external electric field of 12.5 V μm-1 , which is one of the best performance in molecular glasses under the same test conditions. Coupled with their convenient synthesis, this work will provide a new simple design strategy for organic PR materials.

show abstract

Synthesis, Characterization, Absorbance, Fluorescence and Non Linear Optical Properties of Some Donor Acceptor Chromophores

Cited by 46 publications

References 17 publications

Identification of thiol from 11-(9-carbazolyl)-1-undecyl disulfide by NMR spectroscopy and single step coating of gold nanoparticles

Identification of thiol from 11-(9-carbazolyl)-1-undecyl disulfide by NMR spectroscopy and single step coating of gold nanoparticles

The Thermodynamic and Kinetic Properties of 2-Hydroxypyridine/2-Pyridone Tautomerization: A Theoretical and Computational Revisit

Photorefractive hyper-structured molecular glasses constructed by calix[4]resorcinarene core and carbazole-based methine nonlinear optical chromophore

Contact Info

Product

Resources

About