Publications

blue bulletDibyendu Das, Sangita Roy, Sisir Debnath and Prasanta Kumar Das*.
   Surfactant Stabilized Small Hydrogel Particles in Oil: Hosts for Remarkable Activation of Enzymes in Organic Solvents.

   Chem. Eur. J.
2010, 16, 4911-4922. 

blue bulletSubhabrata Maiti, Dibyendu Das, Anshupriya Shome and Prasanta Kumar Das*.
   Influence of Varying Sized Gold Nanoparticles in Improving the Lipase Activity within Cationic Reverse Micelles.

   Chem. Eur. J. 2010, 16, 1941-1950.  

blue bulletSounak Dutta, Dibyendu Das, Antara Dasgupta and Prasanta Kumar Das*.
   Amino Acid-Based Low-Molecular-Weight Ionogels as Efficient Dye-Adsorbing Agents and Template for the Synthesis of TiO2 Nanoparticles.

   Chem. Eur. J. 2010, 16, 1493-1505.  

blue bulletTanmoy Kar, Sounak Dutta, and Prasanta Kumar Das*.
   pH-Triggered conversion of soft nanocomposites: in situ synthesized AuNP-hydrogel to AuNP-organogel.

   Soft Matter 2010, 6, (in Press). 

blue bulletSisir Debnath, Dibyendu Das, Sounak Dutta and Prasanta Kumar Das*.
   Imidazolium Bromide-Based Ionic Liquid Assisted Improved Activity of Trypsin in Cationic Reverse Micelles.
   Langmuir
2010, 26, 4080-4086. 

blue bulletSisir Debnath, Anshupriya Shome, Dibyendu Das and Prasanta Kumar Das*.
   Hydrogelation Through Self-Assembly of Fmoc-Peptide Functionalized Cationic Amphiphiles: Potent Antibacterial Agent.
   J. Phys. Chem. B  2010, 114, 4407-4415. 

blue bulletKajari Maiti, Debolina Mitra, Rajendra Narayan Mitra, Amiya K. Panda, Prasanta Kumar Das, Animesh K. Rakshit and Satya P. Moulik.
   Self-Aggregation of Synthesized Novel Bolaforms and their Mixtures with Sodium Dodecylsulfate (SDS) and Cetyltrimethylammonium Bromide (CTAB) in Aqueous Medium.
   J. Phys. Chem. B 2010, 114, 7499-7508.

blue bulletSayanti Brahmachari, Sisir Debnath, Sounak Dutta, and Prasanta Kumar Das*.
   Pyridinium based amphiphilic hydrogelators as potential antibacterial agents.
   Beilstein Journal of Organic Chemistry 2010, in press (Thematic series on “Organic Gelators and Hydrogelators”, Invited Article).      

blue bulletSounak Dutta, Anshupriya Shome, Sisir Debnath, and Prasanta Kumar Das*.
   Counterion dependent hydrogelation of amino acid-based amphiphiles: switching from non-gelators to gelators and facile synthesis of silver nanoparticles.

   Soft Matter 2009, 5, 1607-1620. 

blue bulletDibyendu Das and Prasanta Kumar Das*.
   Superior Activity of Structurally Deprived Enzyme-Carbon Nanotube Hybrids in Cationic Reverse Micelles.
   Langmuir 2009, 25, 4421-4428.

blue bulletTanmoy Kar, Sisir Debnath, Dibyendu Das, Anshupriya Shome, and Prasanta Kumar Das*.
   Organogelation and Hydrogelation of Low-Molecular-Weight Amphiphilic Dipeptides:  pH-Responsiveness in Phase Selective Gelation and Dye Removal. 
   Langmuir 2009, 25, 8639-8648. 

blue bulletDeenan Santhiya, Rita S. Dias,* Anshupriya Shome, Prasanta Kumar Das*, Maria G. Miguel, Björn Lindman and Souvik Maiti1*.
   Role of linker groups between hydrophilic and hydrophobic moieties of cationic surfactants on the oligonucleotide – surfactant interactions.
   Langmuir 2009, 25, 13770-13775.

blue bulletRajendra Narayan Mitra, Anshupriya Shome, Pritha Paul, and Prasanta Kumar Das*.
   Antimicrobial activity, biocompatibility and hydrogelation ability of dipeptide-based amphiphiles.
  Org. Biomol. Chem. 2009, 7, 94-102.

blue bullet Sisir Debnath, Anshupriya Shome, Sounak Dutta, and Prasanta Kumar Das*.
   Dipeptide Based Low-Molecular-Weight Efficient Organogelators and Its Application in Water Purification.
   Chem. Eur. J. 2008, 14, 6870-6881(in the Cover Page).

Vaibhav M. Jadhav, Souvik Maiti*, Antara Dasgupta, Prasanta Kumar Das*, Rita S. Dias*, Maria G. Miguel, Björn Lindman.
   Effect of the head-group geometry of amino-acid based cationic surfactants on interaction with plasmid DNA.
   Biomacromolecules 2008, 9, 1852-1859.

blue bullet Rita S. Dias,* Luís M. Magno, Artur J. M. Valente, Dibyendu Das, Prasanta Kumar Das*, Souvik Maiti,* Maria G. Miguel, and Björn Lindman.
   Interaction between DNA and Cationic Surfactants: Effect of DNA Conformation and Surfactant Headgroup.
   J. Phys. Chem. B 2008, 112, 14446-14452.

Anshupriya Shome, Sisir Debnath, and Prasanta Kumar Das*.
   Head Group Modulated pH-Responsive Hydrogel of Amino Acid- Based Amphiphiles: Entrapment and Release of Cytochrome c and Vitamin B12.
   Langmuir 2008, 24, 4280-4288.

Rajendra Narayan Mitra, and Prasanta Kumar Das*.
   In situ Preparation of Gold Nanoparticles of Varying Shape in Molecular Hydrogel of Peptide Amphiphiles.
   J. Phys. Chem. C 2008, 112, 8159-8166.

Sangita Roy, and Prasanta Kumar Das*.
   Antibacterial Hydrogels of Amino Acid-Based Cationic Amphiphiles. 
   Biotechnology and Bioengineering 2008, 100, 756-764.

Dibyendu Das, Debapratim Das, Prasanta Kumar Das*.
   Improved activity of enzymes in mixed cationic reverse micelles with imidazolium-based surfactants.
   Biochimie 2008, 90, 820-829.

Rajendra Narayan Mitra, Debapratim Das, Sangita Roy, and Prasanta Kumar Das*.
   Structure and Properties of Low Molecular Weight Amphiphilic Peptide Hydrogelators.
   J. Phys. Chem. B 2007, 111, 14107-14113.

Sangita Roy, Antara Dasgupta, and Prasanta Kumar Das*.
   Alkyl Chain Length Dependent Hydrogelation of L-Tryptophan Based Amphiphile.
   Langmuir 2007, 23, 11769-11776.

Dibyendu Das, Antara Dasgupta and Prasanta Kumar Das *
   Improved activity of horseradish peroxidase (HRP) in 'specifically designed' ionic liquid.
   Tetrahedron Lett. 2007, 48, 5635-5639.

Antara Dasgupta, Prasanta Kumar Das*, Rita S. Dias*, Maria G. Miguel, Björn Lindman1, Vaibhav M. Jadhav, Muthaiah Gnanamani, Souvik Maiti*.
   Effect of headgroup on DNA-cationic surfactant interactions
   J. Phys Chem. B 2007 111, 8502-8508.

Sisir Debnath, Dibyendu Das, and Prasanta Kumar Das*.
   Unsaturation at the surfactant head: Influence on the activity of lipase and horseradish peroxdiase in reverse micelles.
   Biochemical and Biophysical Research Communications 2007, 356, 163-168.

Anshupriya Shome, Sangita Roy, and Prasanta Kumar Das*
   Nonionic Surfactants: A Key to Enhance the Enzyme Activity at Cationic Reverse Micellar Interface.
   Langmuir 2007, 23, 4130-4136.

Antara Dasgupta, Debapratim Das, and Prasanta Kumar Das*
   Probing the Relationship Between Interfacial Concentrations and Lipase Activity in Cationic W/O Microemulsions: A Quantitative Study by Chemical Trapping.
   Langmuir 2007, 23, 4137-4143.

Antara Dasgupta, Rajendra Narayan Mitra, Sangita Roy and Prasanta Kumar Das*
   Asymmetric Resolution in Ester Reduction by NaBH4 at the Interface of Aqueous Aggregates of Amino Acid, Peptide, and Chiral Counter-ion based Cationic Surfactants.
   Chem. Asian J. 2006,1, 780-788 (in the Cover Page).

Kallol Mohanta, Amlan J. Pal*, Sangita Roy and Prasanta Kumar Das*
   A Control Over Accessibility of Immobilized Enzymes Through Porous Coating Layer.
   J. Colloid Interface Sci. 2006, 304, 329-334.

Sisir Debnath, Antara Dasgupta, Rajendra Narayan Mitra, and Prasanta Kumar Das*
   Effect of Counterions on the Activity of Lipase in Cationic Water-in-Oil Microemulsions.
   Langmuir 2006, 22, 8732-8740.

Debolina Mitra, Indranil Chakraborty, Subhash C. Bhattacharya, Satya P. Moulik*,
   Sangita Roy, Debapratim Das, and Prasanta Kumar Das* Physicochemical studies on cetylammonium bromide and its modified (mono-, di- and trihydroxyethylated) head group analogues. Their micellization characteristics in water and thermodynamic and structural aspects of water-in-oil microemulsion formed with them along with n-hexanol and isooctane.
   J. Phys. Chem. B 2006, 110, 11314-11326.

Debapratim Das, Antara Dasgupta, Sangita Roy, Rajendra Narayan Mitra, Sisir Debnath, and Prasanta Kumar Das*.
   Water Gelation of an Amino Acid Based Amphiphile.
   Chem. Eur. J. 2006, 12, 5068-5074 (in the Cover Page).

Sangita Roy, Antara Dasgupta, and Prasanta Kumar Das*.
   Tailoring of Horseradish Peroxidase Activity in Cationic Water-in-Oil Microemulsions.
   Langmuir 2006, 22, 4567-4573.

Rajendra Narayan Mitra, Antara Dasgupta, Debapratim Das, Sangita Roy, Sisir Debnath, and Prasanta Kumar Das*.
   Geometric Constraints at the Surfactant Head Group: Effect on Lipase Activity in Cationic Reverse Micelle.
   Langmuir 2005, 21, 12115-12123.

Debapratim Das, Sangita Roy, Rajendra Narayan Mitra, Antara Dasgupta, and Prasanta Kumar Das*.
   Head group size or hydrophilicity of surfactant: the major regulator of lipase activity in cationic w/o microemulsions.
   Chem. Eur. J. 2005, 11, 4881-4889 (in the Cover Page).

Sangita Roy, Debapratim Das, Antara Dasgupta, Rajendra Narayan Mitra, and Prasanta Kumar Das*. 
   Amino Acid Based Cationic Surfactants in Aqueous Solution: Physicochemical Study and Application of Supramolecular Chirality in Ketone Reduction.
   Langmuir 2005, 21, 10398-10404.

Antara Dasgupta, Debapratim Das, Rajendra Narayan Mitra, and Prasanta Kumar Das*.
   Surfactant tail-length dependent lipase activity profile in cationic water-in-oil microemulsions.
   J. Colloid Interface Sci.
2005, 289, 566-573.

Antara Dasgupta, Debapratim Das, and Prasanta Kumar Das*.
   Reactivity of trypsin in reverse micelles: neglected role of aggregate size compared to water-pool components.
   Biochimie 2005, 87, 1111-1119.

Debapratim Das, Sangita Roy and Prasanta Kumar Das*.
   Efficient and Simple NaBH4 reduction of esters at cationic micellar surface.
  Org. Lett. 2004, 6, 4133-4137.

Debapratim Das and Prasanta Kumar Das*.
   Improving the lipase activity profile in cationic water-in-oil microemulsions of hydroxylated surfactants.
   Langmuir 2003, 19, 9114-9119.

Prasanta Kumar Das, Jose M. M. Caaveiro,
   Susana Luque and Alexander M. Klibanov. Binding of hydrophobic hydroxamic acids enhances peroxidase's stereoselectivity in nonaqueous sulfoxidations.
   J. Am. Chem. Soc. 2002,124, 782-787.

Prasanta Kumar Das, Jose M. M. Caaveiro,
   Susana Luque and Alexander M. Klibanov. Asymmetric sulfoxidations mediated by a-chymotrypsin.
   Biotechnology and Bioengineering 2002, 78, 104-109.

Xie Yuchun, Prasanta Kumar Das, Jose M. M. Caaveiro, and Alexander M. Klibanov.
   Unexpectedly enhanced stereoselectivity of peroxidase-catalyzed sulfoxidations in branched alcohols.
   Biotechnology and Bioengineering 2002, 79, 105-111.

Xie Yuchun, Prasanta Kumar Das and Alexander M. Klibanov.
   Excipients activate peroxidases in specific but not in nonspecific reactions in organic solvents.
   Biotechnology Letters 2001, 23, 1451-1454.

Prasanta Kumar Das and Arabinda Chaudhuri.
   On the origin of unchanged lipase activity profile in cationic reverse micelles.
   Langmuir 2000, 16, 76-80.

Prasanta Kumar Das and Arabinda Chaudhuri.
   Are the interfacial basicities of aqueous cationic micelles and cationic reverse microemulsions different by orders of magnitude?
   Langmuir 1999, 15, 8771-8775.

Prasanta Kumar Das and Arabinda Chaudhuri, Satyen Saha and Anunay Samanta.
   First simultaneous estimates of the water pool core size and the interfacial thickness of a cationic water-in-oil microemulsion by combined use of chemical trapping and time resolved fluorescence quenching.
   Langmuir 1999, 15, 4765-4772.

Prasanta Kumar Das, Gollapudi Venkata Srilakshmi and Arabinda Chaudhuri.
   Experimental probing of water and counterion concentrations inside a reversed micelle water-pool: An overlooked parameter in micellar enzymology.
   Langmuir 1999, 15, 981-987.

Rajkumar Banerjee, Prasanta Kumar Das, Gollapudi Venkata Srilakshmi, Nalam Madhusudhana Rao and Arabinda Chaudhuri.
   A novel series of Non-glycerol based cationic transfection lipids for use in liposomal gene delivery.
   J. Med. Chem. 1999, 42, 4292-4299.

Rajkumar Banerjee#, Prasanta Kumar Das#, and Arabinda Chaudhuri.
   Interfacial Indazolization: novel chemical evidence for remarkably high exo-surface pH of cationic liposome used in gene transfection.
   Biochim. Biophys. Acta (Biomembrane) 1998, 1373, 299-308. (# authors contributed equally).

Prasanta Kumar Das, Arabinda Chaudhuri, Thengumpillil Narayana Balagopala Kaimal and Uday Triambakaraj Bhalerao.
   Isolation of g-Oryzanol through calcium ion induced precipitation of anionic micellar aggregates.
   J. Agric. Food Chem. 1998, 46, 3073-3080.

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Last Update August 06, 2010