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2011
50. Temperature-Dependent Optical
Absorption Properties of Monolayer-Protected Au25 and Au38 Clusters
Devadas, M. S.; Bairu, S.; Qian, H.; Sinn, E.; Jin, R.; *Ramakrishna, G. J. Phys. Chem. Lett. 2011, 2, 2752
-2758.
49. A ‘turn-on’ fluorescent sensor for the
selective detection of cobalt and nickel ions in aqueous media
Abebe, F. A.; Eribal, C. S.; Ramakrishna,
G.; Sinn, E. Tetrahedron Letters 2011, 52, 5554-5558.
2010
48. Unique Ultrafast Visible Luminescence
in Monolayer-Protected Au25 Clusters
Devadas,
M.S.; Kim, J.; Sinn, E.; Lee, D.; Goodson, T. III; *Ramakrishna, G. J.
Phys. Chem. C 2010, 114,
22417-22423.
47. Excited-State Structure of Oligothiophene Dendrimers:
Computational and Experimental Study
Badaeva, E.; Harpham, M. R.; Guda, Ramakrishna; Suzer,
O.; Ma, C-Q.; Bauerle, P.; Goodson, T. III; Tretiak, S. J. Phys. Chem. B 2010, 114, 15808-15817.
46. Interfacial charge transfer dynamics in
small molecule-modified TiO2 nanoparticles
Varaganti, S., Mghangha,
E., Hasan, J. A., *Ramakrishna, G Proceedings
of SPIE 2010 7758, 775802.
45. Dynamics of Interfacial Charge Transfer
Emission in Small Molecule-Sensitized TiO2 nanoparticles: Is it localized or
Delocalized?
Varaganti, S.; *Ramakrishna, G. J. Phys. Chem. C 2010,
114, 13917-13925.
44.Single-colour pseudorotaxane-based temperature sensing
Fernando, I.; Bairu, S.;
*Ramakrishna, G.; Mezei, G. New.
J. Chem. 2010, 34, 2097-2100.
43. Single- and Multiphoton Turn-On Fluorescent
Fe3+ Sensors Based on Bis(rhodamine)
Weerasinghe, A.; Schmeising,
C.; Varaganti, S.; *Ramakrishna, G.; Sinn,
E. J. Phys. Chem. B 2010, 114, 9413-9419.
42. Opticallly Excited Acoustic Vibrations in
Quantum-Sized Monolayer-Protected Gold Clusters
Varnavski, O; Ramakrishna G.;
Kim, J.; Lee. D.; Goodson, T. III ACS Nano 2010, 4,
3406-3412.
41. Ultrafast Optical Study of small Gold Monolayer Protected Clusters: A
Closer Look at Emission
Yau, S. H.; Varnavski, O.; Gilbertson, J. D.; Chandler, B.; Ramakrishna,
G.; Goodson, T. III J. Phys. Chem. C. 2010, 114,
ASAP article.
40. Directional electron transfer in chromophore-labeled quantum-sized Au25
clusters: Au25 as an electron donor
Devadas, M. S; Kwak, K; Park, J-P; Choi, J-H; Jun, C-H; Sinn, E; *Ramakrishna, G.;
Lee, D. J. Phys. Chem. Lett. 2010, 1,
1497-1503.
39. Critical size for the observation of quantum confinement in gold clusters
Varnavski, O; Ramakrishna Guda;
Kim, J; Lee. D; Goodson, T J. Am. Chem. Soc. 2010,132¸16.
38. Ultra-fast Optical Excitations In Supramolecular
Metallacycles with Charge Transfer Properties
Flynn, D; Ramakrishna, Guda;
Yang, H-B; Northrop, B; Stang, P; Goodson, T J.
Am. Chem. Soc. 2010, 132¸ 1348.
2009
37. Ultrafast Intersystem Crossing: Excited State Dynamics of Platinum Acetylide Complexes
Ramakrishna, Guda; Goodson, T. III; Rogers-Haley, J. E.; Cooper, T. M.;
McLean, D. G.; Urbas, A. J. Phys. Chem. C 2009,
113, 1060.
36. Dynamics and Two photon absorption properties of chromophore
functionalized semiconductor nanoparticles
Varaganti, S; Gessesse,
M; Obare, S. O; *Ramakrishna, G Proc SPIE¸2009,
7413-09, 741309/1-741309/12.
2008
35. Quantum Sized Gold Clusters as Efficient Two-Photon
Absorbers
Ramakrishna, Guda; Varnavaski,
O.; Kim, J.; Lee, D.; Goodson, T. III J. Am. Chem. Soc. 2008, 130,
5032.
34. Molecules with Perfect Cubic Symmetry as Nanobuilding
Blocks for 3-D Assemblies. Elaboration of Octavinylsilsesquioxane.
Unusual Luminescence Shifts May Indicate Extended Conjugation Involving
the Silsesquioxane Core
Sulaiman, S; Bhaskar, A;
Zhang, J; Guda, Ramakrishna; Goodson,
T. III; Laine, R. M Chemistry of Materials 2008,
20, 5563.
33. Two-Photon Enhancement in Organic Nanorods
Raymond, J. R.; Ramakrishna, Guda; Tweig, R. J.; Goodson, T. III J. Phys. Chem. C 2008,
112, 7913.
32. Giant Thienylene-Acetylene-Ethylene Macrocycles with Large Two-Photon Absorption
Cross-Section and Semi-Shape-Persistence
Williams-Harry, Michelle, Bhaskar, A.; Ramakrishna,
Guda; Goodson, T.III; Imamura, M.; Matawari, A.; Nakao, K.; Enozawa, H.; Nishinaga, T.; Iyoda, M. J. Am. Chem. Soc 2008, 130,
3252.
31. Oligothiophene Dendrimers
as New Building Blocks for Optical Applications
Ramakrishna, Guda; Bhaskar,
A; Ma, C.-Q; Bauerle, P.; Goodson, T. III J.
Phys. Chem. A 2008, 128, 2018.
2007
30. Interparticle Electromagnetic Coupling in
Assembled Gold-Necklace Nanoparticles
Ramakrishna, Guda; Dai, Q; Zou, J; Huo, Q; Goodson, T. III
J. Am. Chem. Soc. 2007, 129, 1848.
29. Zinc Sensing via Enhancement of Two-Photon Excited Fluorescence
Bhaskar, A.; Ramakrishna, Guda;
Tweig, R. J.; Goodson, T. III J. Phys. Chem.
C (letter) 2007, 111, 14607.
28. Excited State Deactivation of Branched Two Photon Absorbing
Chromophores: A Femtosecond Transient Absorption Investigation
Guda Ramakrishna; Goodson, T. III. J.
Phys. Chem. A 2007, 111, 993.
27. Physicochemical and Photophysical Studies
on Porphyrin-Based Donor-Acceptor Systems: Effect
of Redox Potentials on Ultrafast Electron-Transfer
Dynamics
A. D. Jose, A. D. Shukla, G. Ramakrishna, D.
K. Palit, H. N. Ghosh and
A. Das J. Phys. Chem. B 2007, 111, 9078.
26. Enhancement of Two-Photon Absorption Cross Section in Macrocyclic
Thiophenes with Cavities in the Nanometer Regime
Bhaskar, A; Ramakrishna, Guda; Hagedorn, K; Varnavski, O; Osteritz, E. M; Bauerle, P; Goodson, T. III. J. Phys. Chem. B 2007,
111, 946.
2006
25. Building Two-Dimensional, Symmetric Two-Photon Molecular Materials
Bhaskar, A; Ramakrishna, Guda;
Haley, M. M; Goodson, T. III J. Am. Chem. Soc. 2006, 128,
13972.
24. Investigation of Two-Photon Absorption Properties in Branched Alkene and Alkyne Chromophores
Bhaskar, A; Ramakrishna, Guda; Lu, Z; Tweig, R:
Hales, J. M; Hagan, D. J; Van Stryland,
E; Goodson, T. III. J. Am. Chem. Soc. 2006, 128, 11840.
23. Ultrafast Excited State Relaxation Dynamics of Branched Donor-p-Acceptor
Chromophore: Evidence of Charge Delocalized State
Ramakrishna, Guda; Bhaskar,
A; Goodson, T. III. J. Phys. Chem. B 2006, 110, 20872.
22. Ultrafast Dynamics and Excited State Deactivation of [Ru(bpy)2Sq]
and its Derivatives
Ramakrishna, G; Jose, D. A; Kumar, D. K; Das, A.; Palit, D. K; Ghosh, H. N. J.
Phys. Chem. B 2006, 110, 10197.
21. Interfacial Electron Transfer between the Photoexcited
Porphyrin Molecule and TiO2 nanoparticles: Effect
of Catecholate Binding
Ramakrishna, G; Verma, S; Jose, D. A; Kumar,
D. K; Das, A; Palit, D. K; Ghosh,
H. N. J. Phys. Chem. B 2006, 110, 9012.
20. Interfacial Electron Transfer Dynamics into the Surface States of
ZrO2 Nanoparticles from Photo-excited Quinizarin
and its Derivatives
Ramakrishna, G; Rath, M. C; Ghosh, H. N. Proceedings-Electrochemical Society, 2006,
2004-22, 99.
2005
19. Ultrafast Intermolecular Hydrogen Bond Dynamics in the Excited State of Fluorenone
Samant, V; Singh, A. K; Ramakrishna, G; Ghosh, H. N; Ghanty, T. K; Palit,D. K. J. Phys. Chem. A 2005, 109,
8693.
18. Ultrafast Dynamics of Photoinduced
Intermolecular Electron Transfer Process in Micelle
Singh, A. K; Mondal, J. A; Ramakrishna, G; Ghosh, H. N; Bandyopadhyay,
T; Palit, D. K. J. Phys. Chem. B 2005,
109, 4014.
17. Synthesis, Characterization, Physicochemical and Photophysical
Studies of Some Redox Switchable NIR dye Derived
from Ruthenium-dioxolene-porphyrin
System
Jose, A. D; Shukla, A. D; Krishnakumar,
D; Ganguly, B; Das, A; Ramakrishna, G;
Palit, D. K; Ghosh, H. N.
Inorganic Chemistry 2005, 44, 2414.
16. Electron Injection into the Surface States of ZrO2 Nanoparticles
from Photoexcited Quinizarin
and Its Derivatives: Effect of Surface Modification
Rath, M, C; Ramakrishna, G; Mukherjee, T; Ghosh, H. N. J.
Phys. Chem. B 2005, 109, 20485.
15. Strongly Coupled Ruthenium-Polypyridyl
Complexes for Efficient Electron Injection in Dye-Sensitized Semiconductor
Nanoparticles
Ramakrishna, G; Jose, A. D; Kumar, D. K; Das, A; Palit,
D. K; Ghosh H. N. J. Phys. Chem. B 2005,
109, 15445.
2004
14. Ultrafast Intramolecular Electronic Energy
Transfer in a Directly Linked Donor-Acceptor Molecule
Mondal, J. A; Ramakrishna, G; Singh,
A. K; Ghosh, H. N; Mariappan,
M; Maiya, B. G; Mukherjee,
T; Palit, D. K. J. Phys. Chem. A 2004,
108,7843.
13. Photophysics and Ultrafast Relaxation Dynamics
of the Excited States of Dimethylaminobenzophenone
Singh, A. K; Ramakrishna, G; Ghosh, H.
N; Palit, D. K. J. Phys. Chem. A 2004,
108, 2583.
12. Electron Transfer Dynamics of 7-N,N Dimethyl coumarin 4-acetic acid (DMACA) and 7-Hydroxy Coumarin 4-acetic acid (HCA) into TiO2 and ZrO2
nanoparticles
Ramakrishna, G; Singh, A. K; Palit, D. K; Ghosh, H. N. J. Phys. Chem. B 2004, 108,
12489.
11. Determination of Back Electron Transfer Rate from the Surface States of Quinizarin Sensitized ZrO2 Nanoparticles by Monitoring
Charge Transfer Emission
Ramakrishna, G; Ghosh, H. N. Langmuir
2004, 20,7342.
10. Dynamics of Interfacial Electron Transfer from Photo-excited Quinizarin (Qz) into the
Conduction Band of TiO2 and Surface States of ZrO2 Nanoparticles
Ramakrishna, G; Singh, A. K; Palit, D. K; Ghosh, H. N. J. Phys. Chem. B 2004, 108,
4775.
9. Effect of Surface Modification on Back Electron Transfer of Di-bromo Fluorescein (DBF)
Sensitized TiO2 Nanoparticles
Ramakrishna, G; Das, A; Ghosh, H. N. Langmuir
2004, 20, 1430.
8. Slow Back Electron Transfer in Surface-modified TiO2 Nanoparticles
Sensitized by Alizarin
Ramakrishna, G; Singh, A. K; Palit, D. K; Ghosh, H. N. J. Phys. Chem. B 2004, 108,
1701.
2003
7. Effect of Particle Size on the Reactivity of Quantum Size ZnO
Nanoparticles & Charge Transfer Dynamics with Adsorbed Catechols
Ramakrishna, G; Ghosh, H. N. Langmuir 2003,
19, 3006.
6. Optical and Photochemical Properties of Sodium Dodecyl
Benzene Sulphonate (DBS) Capped TiO2 Nanoparticles
Dissolved in Non-aqueous Solvents
Ramakrishna, G; Ghosh, H. N. Langmuir
2003, 19, 505.
2002
5. Efficient Electron Injection from Twisted Intramolecular
Charge Transfer (TICT) State of 7-Diethyl Amino Coumarin
3-Carboxylic Acid (D-1421) dye to TiO2 Nanoparticle
Ramakrishna, G; Ghosh, H. N. J. Phys.
Chem. A. 2002, 106, 2545.
2001
4. Dynamics of Back Electron Transfer Processes of Strongly Coupled
Tri-phenyl Methane Dyes Adsorbed on TiO2 Nanoparticle Surface as Studied by
Fast and Ultra-fast visible Spectroscopy
Ramakrishna, G; Ghosh, H. N; Singh, A. K; Palit D. K. and J. P. Mittal J.
Phys. Chem. B. 2001, 105, 12786.
3. Emission from Charge-Transfer State of Xanthene
Dye-Sensitized TiO2 Nanoparticles A New Approach to Determine Back Electron
Transfer Rate and Verification of Marcus Inverted Regime
Ramakrishna, G; Ghosh, H. N. J. Phys. Chem.
B 2001, 105, 7000.
2. Rotational Dynamics of Coumarins in Nonasscoiative Solvents: Point Dipole versus Extended
Charge Distribution Models of Dielectric Friction
Dutt, G. B; Rama Krishna, G; Raman, S. J.
Chem. Phys. 2001, 115, 4732.
2000
1. Temperature Dependent Rotational Relaxation of Nonpolar
Probes in Mono and Diols: Size Effects versus
Hydrogen Bonding
Dutt, G. B; Rama
Krishna, G J. Chem. Phys. 2000, 112, 4676.
Book Chapters
1.
Controlled Chemical Functionalization of Gold
Nanoparticle
Zou, J.; Dai, Q.; Guda
Ramakrishna; Liu, X.; Worden, J. G.; Goodson, T. III.; Huo,
Q. in "Nanoparticles: Synthesis, Stabilization,Passivation
and Functionalization", Eds., R. Nagarajan and T.A.Hatton, ACS
Symposium Series 996, American Chemical Society, Washington DC.,Chapter 3 (in press). ISBN 978-0-8412-6969-9.
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