Davood Chobfrosh Khoei

Islamic Azad University, Tehran

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Hasan Tahermansouri

Islamic Azad University of Ayatollah Amoli

Khadijeh Yadollahzadeh

Islamic Azad University, Aliabad Katoul

Javad Azizian

Islamic Azad University, Science and Research Branch

Akram Sadat Delbari

Islamic Azad University Islamshahr Branch

Masoumeh Meskinfam

Islamic Azad University, Lahijan Branch

Masoumehmeskinfam

Cooperative Institutions

Islamic Azad University, Tehran

Islamic Azad University, Science and Research Branch

Shahid Beheshti University

Islamic Azad University, Lahijan Branch

Politecnico di Milano

Islamic Azad University Tonekabon

Isfahan University of Technology

Islamic Azad University of Ayatollah Amoli

National Institute of Genetic Engineering and Biotechnology

York University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Functionalization of Carboxylated Multi-Walled Carbon Nanotubes With 1, 4-Phenylendiamine, Phenylisocyanate and Phenylisothiocyanate

Fullerenes Nanotubes and Carbon Nanostructures (2011)

Javad Azizian Davood Chobfrosh Khoei Hasan Tahermansouri Khadijeh Yadollahzadeh

We reported a noticeable methodology for functionalization of carboxylated multi-walled carbon nanotubes (MWNT-COOH) using 1, 4-phenylendiamine and the latter modification by phenylisocyanate and phenylisothiocyanate. All products were characterized by FT-IR and Raman spectroscopy, SEM, elemental analysis and 1H NMR spectrum. The 1H NMR spectrum of products confirmed formation of MWNT-amide, MWNT-urea and MWNT-thiourea. Functionalization of NH2, NHCO, NHCS and NCO groups is very important due to increasing the MWNT solubility and creating active sites for further reactions.

Phenyl isocyanate

Surface Modification

Amide

10.1080/1536383x.2010.515762

Cite

Citations (20)

Efficient Synthesis of Urea Derivatives via a Sequential One-Pot Nucleophilic Addition/Ugi Five-Component Reaction Under Solvent-Free Conditions

Synthetic Communications (2012)

Javad Azizian Khadijeh Yadollahzadeh Hasan Tahermansouri Davood Chobfrosh Khoei Akram Sadat Delbari

Abstract Urea polyfunctional derivatives were successfully synthesized via a one-pot, five-component nucleophilic addition/Ugi reaction sequence. Simplicity, solvent-free conditions, and good yields of products are advantages of this method.

Ugi reaction

Nucleophilic Addition

Component (thermodynamics)

Sequence (biology)

Reaction conditions

10.1080/00397911.2011.553697

Cite

Citations (6)

FUNCTIONALIZATION OF CARBOXYLATED MULTI-WALL NANOTUBES WITH 1,2-PHENYLENEDIAMINE

International journal of nanodimension. (2010)

Hasan Tahermansouri Davood Chobfrosh Khoei Masoumeh Meskinfam

In this paper, the chemical functionalization of carboxylated multi-walled carbon nanotubes (MWNT-COOH) by 1,2-phenylenediamine, have been investigated. MWNT-benzimidazole is obtained through MWNT-Amide reaction with POCl3 after 72h, which is confirmed by FT-IR, SEM, TGA, and elemental analysis. These functionalizations have been chosen due to –NH2 and NHCO active sites in MWNT-Amide for future application. Keyword: Functionalization, 1, 2-phenylenediamine, Carboxylated multiwall nanotubes

Surface Modification

Amide

Benzimidazole

Chemical modification

10.7508/ijnd.2010.02.008

Cite

Citations (9)

Microwave-Induced Chemical Functionalization of Carboxylated Multi-Walled Nanotubes With 2,3-diaminopyridine

Fullerenes Nanotubes and Carbon Nanostructures (2011)

Javad Azizian Hasan Tahermansouri Davood Chobfrosh Khoei Khadijeh Yadollahzadeh Akram Sadat Delbari

In this paper, the microwave-induced chemical functionalization of carboxylated multi-walled carbon nanotubes (MWNT-COOH) by 2,3-diaminopyridine, have been investigated. The major advantage of this high-energy procedure is reducing the reaction time to the order of minutes and the number of steps in the reaction procedure compared to that of conventional functionalization processes. These functionalizations involve amidation and cycloaddition reactions, respectively. The amidation was completed in one step as compared to two in the conventional approach. The acid chloride formation step was eliminated here. The cycloaddition of MWNTs with triphenylphosphite to producing MWNT-4-azabenzimidazole was carried out in 20 minutes under microwave conditions, and the results were similar to what was achieved in 4 days using conventional methods. The interesting point is that modified MWNT can be homogeneously dispersed in DMF without sonication and the dispersed MWNT does not sediment in 1 month. The results are confirmed by FT-IR, SEM, RAMAN, TGA, DTA and elemental analysis.

Surface Modification

Chemical modification

10.1080/1536383x.2010.533311

Cite

Citations (12)

The Chemical Functionalization of Carboxylated Multi-Wall Nanotubes With 2-Aminophenole Via Microwave Irradiation

Oriental Journal Of Chemistry (2011)

Hasan Tahermansouri Davood Chobfrosh Khoei Masoumehmeskinfam

In this paper, we have reported a highly efficient approach to functionalize carboxylated multi- walled carbon nanotubes (MWNT-COOH) by 2-aminophenole under microwave irradiation. Reducing the reaction time to the order of minutes and the number of steps in the reaction procedure is the major advantage of this procedure respect to conventional functionalization methods. These functionalizations involve amidation and cycloaddition reactions, respectively. The amidation was completed in one step as in the conventional methods, an additional step that is acid chloride formation was eliminated here. The cycloaddition of modified-MWNTs with phosphoryl trichloride to producing MWNT-benzoxazole was carried out in 30 min under microwave conditions, and the results were similar to what was achieved in 4 days using conventional methods. The interesting point is that modified MWNT can be homogeneously dispersed in DMF without sonication and the dispersed MWNT does not sediment in 3 month. The resulting nanotubes were characterized by FT-IR spectroscopy, Thermogravimetric analysis, Raman spectroscopy, Scanning electron microscopy and Elemental analysis.

Thermogravimetric analysis

Surface Modification

Sonication

Source

Cite

Citations (3)

ChemInform Abstract: Efficient Synthesis of Urea Derivatives via a Sequential One‐Pot Nucleophilic Addition/Ugi Five‐Component Reaction under Solvent‐Free Conditions.

ChemInform (2012)

Javad Azizian Khadijeh Yadollahzadeh Hasan Tahermansouri Davood Chobfrosh Khoei Akram Sadat Delbari

Abstract Polyfunctionalized aromatic urea derivatives (VI) are synthesized via novel one‐pot, five component nucleophilic addition—Ugi reaction sequence.

Component (thermodynamics)

Ugi reaction

Nucleophilic Addition

10.1002/chin.201242087

Cite

Citations (0)