James Demas

CV

Select Publications

Undergraduate coauthors are in italics

Educational Experiments, Books, and Reviews

Research Publication

Patents

 

Educational Experiments, Books, and Reviews

  1. J. N. Demas and G. A. Crosby, "The Measurement of Photoluminescence Quantum Yields", J. Phys. Chem. 75, 991 (1971).
  2. J. N. Demas, "Luminescence Spectroscopy and Biomolecular Quenching. A Physical Chemistry Experiment", J. Chem. Ed. 52, 677 (1975).
  3. J. N. Demas, "Luminescence Decay Times. An Ultrafast Kinetics Experiment", J. Chem. Ed. 53, 657 (1976).
  4. A. T. Wyker and J. N. Demas, "Computer Program for Evaluating Luminescence Decay Times", J. Chem. Ed. 53, 656 (1976).
  5. J. N. Demas and S. E. Demas, "Luminescence," The Encyclopedia of Physical Science and Technology," Academic Press, 7, 438-459 (1987).
  6. J. N. Demas, Excited State Lifetime Measurements, Academic Press, 1983.
  7. J. N. Demas and S. E. Demas, Computer Interfacing and Scientific Computing on Personal Computers, Allyn and Bacon, 1990.
  8. LouAnn Sacksteder, R. M. Ballew, E. A. Brown, D. Nesselrodt, and J. N. Demas, "Photophysics in a Disco: Luminescence Quenching of Quinine", J. Chem. Ed., 67, 1065-1067 (1990).
  9. R. M. Ballew, M. Grubb, S. W. Snyder, and J. N. Demas, "Computer Interfaced Fast Kinetics Luminescence Experiment", J. Chem. Ed., 68, 222-225 (1991).
  10. J. N. Demas and B. A. DeGraff, "Design and Applications of Highly Luminescent Transition Metal Complexes", Anal. Chem., 63, 829A-837A (1991).
  11. J. N. Demas, B. A. DeGraff, "Applications of Luminescent Transition Metal Complexes to Sensor Technology and Molecular Probes", J. Chem. Ed., 74, 690-695 (1997).
  12. Kristi A. Kneas, Wenying Xu, J. N. Demas, B. A. DeGraff, "Dramatic Demonstration of Oxygen Sensing by Luminescence Quenching", J. Chem. Ed., 74, 696 (1997).
  13. J. N. Demas, B. A. DeGraff, and P. Coleman, "Oxygen Sensors Based on Luminescence Quenching", Anal. Chem., 71, 793A-800A (1999).
  14. J. N. Demas, B. A. DeGraff, "Applications of Luminescent Transition Platinum Group Metal Complexes to Sensor Technology and Molecular Probes", Coord. Chem. Rev., 211, 317-351 (2001).
  15. B. A. DeGraff, J. N. Demas, Luminescence-Based Oxygen Sensors, Reviews in Fluorescence 2005, Volume 2, Eds. C. Geddes and J. R. Lakowicz, Springer Science, 125-151.
  16. William D. Bare, Chi V. Pham, Matt Cuber, J. N. Demas, "An Improved Method for Studying the Enzyme-Catalyzed Oxidation of Glucose using Luminescent Probes", J. Chem. Ed., 84, 1511-1514 (2007).

 

SELECTED RESEARCH PUBLICATIONS (undergraduates in itallics)

  1. S. H. Peterson and J. N. Demas, "Excited State Acid-Base Reactions of Metal Complexes: Dicyanobis(2,2'-bipyridine)ruthenium(II) in Aqueous Acid", J. Am. Chem. Soc., 98, 7880 (1976).
  2. J. N. Demas, E. W. Harris, and R. P. McBride, "Energy Transfer from Metal Complexes to Oxygen", J. Am. Chem. Soc. 99, 3547-3551 (1977).
  3. C. A. Wight III, T. J. Turley, and J. N. Demas, "A New Approach for the Study of Reversible Excited State Electron Transfer Reactions", J. Chem. Phys. 68, 5486 (1978).
  4. B. A. DeGraff and J. N. Demas, "Mercury(I)/(II)--A Novel Trap for Harvesting Excited-State Energies", J. Am. Chem. Soc. 102, 6169 (1980).
  5. K. Mandel, T. D. L. Pearson, and J. N. Demas, "Luminescent Quantum Counters Based on Organic Dyes in Polymer Matrices", Anal. Chem. 52, 2184 (1980).
  6. S. Buell and J. N. Demas, "Heterogeneous Preparation of Singlet Oxygen Using an Ion Exchange Bound Tris(2,2'-bipyridine)ruthenium(II) Photosensitizer", J. Phys. Chem. 87, 4675-81 (1983).
  7. J. N. Demas and R. A. Keller, "Enhancement of Luminescence and Raman Spectroscopy by Phase Resolved Background Suppression," Anal. Chem., 57, 538-45 (1985).
  8. J. N. Demas and W. M. Jones, and R. A. Keller "Elimination of Quenching Errors in Luminescence Spectrometry by Phase Resolution," Anal. Chem., 58, 1717-21 (1986).
  9. W. J. Dressick, J. I. Cline, III, J. N. Demas, and B. A. DeGraff, "Energy Degradation Pathways and Binding Site Environment of Micelle Bound Ruthenium(II) Photosensitizers," J. Am. Chem. Soc., 108, 756774 (1986).
  10. J. R. Bacon and J. N. Demas, "Determination of Oxygen Concentrations by Luminescence Quenching of a Polymer Immobilized Transition Metal Complex", Anal. Chem., 59, 2780-85 (1987).
  11. D. H. Metcalf, S. W. Snyder, S. Wu, G. L. Hilmes, J. P. Riehl, J. N. Demas, F. S. Richardson, "Excited-State Chiral Discrimination Observed by Time-Resolved Circular Polarized Luminescence Measurements", J. Am. Chem. Soc., 11, 3082-3 (1989).
  12. S. W. Snyder, S. L. Buell, J. N. Demas, and B. A. DeGraff, "Interactions of Ruthenium(II) Photosensitizers with Surfactant Media", J. Phys. Chem., 89, 5265-5271 (1989).
  13. D. H. Metcalf, S. W. Snyder, J. N. Demas, F. S. Richardson, "Excited-State Racemization of a Tris-Terdentate Lanthanide Complex in Aqueous Solution: Time-Resolved Circular Polarized Luminescence Study of Eu(dpa)33- in H2O and D2O", J. Am. Chem. Soc., 112, 469-479 (1990).
  14. D. H. Metcalf, S. W. Snyder, J. N. Demas, F. S. Richardson, "Chiral Discrimination in Electronic Energy-Transfer Processes between Dissymmetric Metal Complexes in Solutions", J. Am. Chem. Soc., 112, 5681-5695 (1990).
  15. E. R. Carraway and J. N. Demas, B. A. DeGraff, and J. R. Bacon, "Photophysics and Photochemistry of Oxygen Sensors Based on Luminescent Transition Metal Complexes", Anal. Chem., 63, 337-342 (1991).
  16. R. M. Ballew and J. N. Demas, "Error Analysis of the Rapid Lifetime Determination Method for Evaluation of Single Exponential Decays Plus a Baseline", Anal. Chim. Acta, 245, 121-7 (1991).
  17. J. N. Demas and B. A. DeGraff, "Luminescence Sensors: Modelling of Microheterogeneous Systems and Model Differentiation", SPIE, Optically Based Methods for Process Analysis, Vol. 1681, 2-11, (1992).
  18. J. N. Demas and B. A. DeGraff, "On the Design of Luminescence Based Temperature Sensors", SPIE, 1796, 71-80 (1992).
  19. Wenying Xu, J. N. Demas, B. A. DeGraff, and M. Whaley, "Interactions of Pyrene with Cyclodextrins and Polymeric Cyclodextrins", J. Phys. Chem., 97, 6546-6554 (1993).
  20. LouAnn Sacksteder, Maria Lee, J. N. Demas, and B. A. DeGraff, "Long Lived, Highly Luminescent Rhenium(I) Complexes as Molecular Probes: Intra- and Intermolecular Excited State Interactions", J. Am. Chem. Soc., 115, 8230-8238 (1993).
  21. H. J. Hough, J. N. Demas, and H. N. G. Wadley, "Luminescent Sensing of Stress in Composite Materials", Proc. of Review of Progress in Quantitative Nondestructive Evaluation, Vol. 12, Eds. D. O. Thomas and D. E. Chimenti, Plenum Press (New York), 1137-45 (1993).
  22. Wenying Xu, Robert Clayton McDonough, III, Brandi Langsdorf, J. N. Demas, and B. A. DeGraff, "Oxygen Sensors Based on Luminescence Quenching: Interactions of Metal Complexes with the Polymer Supports", Anal. Chem., 66, 4133-41 (1994).
  23. J. N. Demas and B. A. DeGraff, "Direct Measurement of Rotational Correlation Times of Luminescent Ruthenium(II) Molecular Probes by Differential Polarized Phase Fluorimetry", J. Phys. Chem, 98, 12478-80 (1994).
  24. J. N. Demas, B. A. DeGraff, and Wenying Xu, "Modeling of Luminescence Quenching Based Sensors: Comparison of Multisite and Nonlinear Gas Solubility Models", Anal. Chem., 67, 1377-1380 (1995).
  25. Wenying Xu, Robert Schmidt, M. Whaley, J. N. Demas, B. A. DeGraff, E. K. Karikari, and B. L. Famer,, "Oxygen Sensors Based on Luminescence Quenching: Interactions of Pyrene with the Polymer Supports", Anal. Chem., 67, 3172-3180 (1995).
  26. Rhett L. Affleck, W. Patrick Ambrose, James N. Demas, Peter M. Goodwin, Jay A. Schecker, Ming Wu, and Richard A. Keller, "Reduction of Luminescent Background in Ultrasensitive Fluorescence Detection by Photobleaching", Anal. Chem. 68, 2270-76 (1996).
  27. Wenying Xu, Kristi A. Kneas, J. N. Demas, B. A. DeGraff, "Oxygen Sensors Based on Luminescence Quenching of Metal Complexes: Osmium Complexes Suitable for Laser Diode Excitation", Anal. Chem., 68, 2605-2609 (1996).
  28. Jason M. Price, Wenying Xu, J. N. Demas, B. A. DeGraff, "Polymer Supported pH Sensors Based on Hydrophobically Bound Luminescent Ruthenium(II) Complexes", Anal. Chem., 70, 265-270 (1998).
  29. J. N. Demas, Ming Wu, Peter M. Goodwin, Rhett L. Affleck, Richard A. Keller, "Fluorescence Detection in Hydrodynamically Focused Sample Streams: Reduction of Diffusional Defocusing by Association of Analyte with High Molecular Weight Species", Appl. Spectrosc., 52, 755-62 (1998).
  30. Ajay Jain, Wenying Xu, J. N. Demas, B. A. DeGraff,, "Binding of Luminescent Ruthenium(II) Molecular Probes to Vesicles", Inorg. Chem, 37, 1876-1879 (1998).
  31. Wenying Xu, John Mehlmann, Jason Rice, James E. Collins, Cassandra Fraser, J. N. Demas, B. A. DeGraff, Mauro Bassetti, pH Sensors Based on Luminescent Ruthenium(II) alpha -Diimine Complexes with Diethylaminomethyl Sensing Groups", SPIE Conference on Environmental Monitoring and Remediation Technologies, Vol. 3534, 456-465 (1998).
  32. Sharman, K. K., Periasamy, A., H. Ashworth, H, Demas, J. N., Snow, N. H., "Error Analysis of the Rapid Lifetime Determination Method for Double-Exponential Decays and New Windowing Schemes", Anal. Chem. 71, 947-952 (1999).
  33. W. D. Bare, J. N. Demas, "Monochromator Wavelength Calibration Standards Extending Into The Near-Infrared Using Second- And Third-Order Emission Lines From Mercury Vapor Lamps", J. Fluoresc. 10, 317-324 (2000).
  34. Yvette Clark, Wenying Xu, J. N. Demas, B. A. DeGraff, "Lifetime Based pH Sensor System Based on a Polymer Supported Ruthenium(II) Complex", Anal. Chem., 72, 3468-75 (2000).
  35. K. A. Kneas, J. N. Demas, B. A. DeGraff, A. Periasamy, "Fluorescence Microscopy Study of Heterogeneity in Polymer Supported, Luminescence Based Oxygen Sensors", Microscopy and Microanalysis, 6, 551-561 (2000).
  36. K. A. Kneas, J. N. Demas, B. A. DeGraff, A. Periasamy, " The use of conventional, confocal, and multi-photon fluorescence microscopy in photochemical and photophysical investigations of luminescence-based oxygen sensors", SPIE Multiphoton Microcopy in the Biomedical Sciences, 4262, 89-97 (2001)
  37. Sing Po Chan, Z. J. Fuller, J. N. Demas, and B. A. DeGraff, "New method of Rapid Luminescence Lifetime Determination Using Square Wave Excitation", Appl. Spect., 55, 1245-1250 (2001)..
  38. Sing Po Chan, Z. J. Fuller, J. N. Demas, and B. A. DeGraff, "Optimized Gating Scheme for Rapid Single Exponential Luminescence Lifetime Determinations", Anal. Chem., Anal. Chem., 73, 4486-4490 (2001).
  39. A. Periasamy, M. Elangovan, H. Willrabe, M. Barroso, J. N. Demas, D. L. Brautigan, R. N. Day, "Wide-Field, Confocal, Two-Photon, and Lifetime Resonance Energy Transfer Imaging Microscopy", Methods in Cellular Imaging, 295-308 (2001).
  40. Wenying Xu, Ajay Jain, Bryan A. Betts, "Single and Multiple Binding of beta-Cyclodextrin and Polymeric beta-Cyclodextrins to Luminescent Ruthenium(II) alpha-Diimine Complexes", J. Phys. Chem. A. 106, 251-257 (2002).
  41. 172. Kristi A. Kneas, J. N. Demas, Bryant Nguyen, Aaron Lockhart, Wenying Xu, and B. A. DeGraff, "Simple Method for Measuring Oxygen Diffusion Coefficients of Polymer Films by Luminescence Quenching", Anal. Chem., 74, 1111-1118 (2002).
  42. Heather M. Rowe, Wenying Xu, J. N. Demas, and B. A. DeGraff, "Metal Ion Sensors Based on a Luminescent Ruthenium(II) Complex: The Role of Polymer Support in Sensing Properties", Appl. Spectrosc., 56, 167-173 (2002).
  43. William D. Bare, Nathan H. Mack, Wenying Xu, J. N. Demas, and B. A. DeGraff, "Multicomponent Lifetime-Based pH Sensors Utilizing Constant-Lifetime Probes", Anal. Chem., 74, 2198-2209 (2002).
  44. Heather M. Rowe, Sing Po Chan, J. N. Demas, and B. A. DeGraff, "Elimination Of Fluorescence And Scattering Backgrounds In Luminescence Lifetime Measurements Using Gated Phase Fluorimetry", Anal. Chem., 74, 4821-4827 (2002).
  45. Rachel D. Bowman, Kristi A. Kneas, James N. Demas, Ammasi Periasamy, "Conventional, Confocal, and Two-Photon Fluorescence Microscopy Investigations of Polymer-Supported Oxygen Sensors", Microscopy and Microanalysis, 211, 112-120 (2002).
  46. Z. J. Fuller, W. D. Bare, K. A. Kneas, J. N. Demas, and B. A. DeGraff, "Photostability of Luminescent Ruthenium(II) Complexes in Polymers and in Solution", Anal. Chem., 75, 2670-2677 (2003).
  47. Heather M. Rowe, Sing Po Chan, J. N. Demas, and B. A. DeGraff, "Self-Referencing Intensity Measurements Based on Square Wave Gated Phase-Modulation Fluorimetry", Appl. Spect. 57, 532-537 (2003).
  48. Christopher Moore, Sing Po Chan, J. N. Demas, and B. A. DeGraff "Comparison of Methods for Rapid Evaluation of Lifetimes of Exponential Decays", Appl. Spect., 58, 602-607 (2004).
  49. William D. Bare, Nathan H. Mack, J. N. Demas, "pH-Dependent Photophysical Behavior of Rhenium Complexes Containing Hydroxypyridine Ligands", Appl. Spect., 58, 1093-1100 (2004).
  50. Walter J. Bowyer, Wenying Xu, and J. N. Demas,* "Determining Oxygen Diffusion Coefficients in Polymer Films by Lifetimes of Luminescent Complexes Measured in the Frequency Domain", Anal. Chem., 76, 4374-4378 (2004).
  51. Beradette Higgins, B. A. DeGraff, J. N. Demas, "Luminescent Transition Metal Complexes as Sensors: Structural Effects on pH Response", Inorg. Chem., 44, 6662-6669 (2005).
  52. Weidong Cao, Jerome P. Ferrance, James Demas and James P. Landers, "Quenching of Electrochemiluminescence of Tris(2,2'-bipyridine)ruthenium(II) by Ferrocene and Its Application to Quantitative DNA Detection", J. Am. Chem. Soc., 128(23), 7572-7578 (2006).
  53. Fiore, G. L.; Edwards, J. M.; Klinkenberg, J. L.; Demas, J. N.; Gioeli, D. G.; Fraser, C. L., "Ruthenium Tris(bipyridine)-Centered PEI for Gene Delivery" Polym. Mater. Sci. Eng., 95, 407-408(2006).
  54. Drew Beck, Jason Brewer, Jennifer Lee, Dana McGraw, B.A. DeGraff, and J. N. Demas, "Localizing Molecular Probes: Inclusion Of Re(I) Complexes In beta-Cyclodextrin,", Coord. Chem. Rev., 251, 546-553 (2007).
  55. Qiu-Xian Ren, Vincent Douglass, III, Wenying Xu, Michal Sabat. A. Periasamy, J. N. Demas, B. A. DeGraff, "Potassium Ions Induced Changes of Crystal Structure and Luminescent Properties of a Fluorescent Crown Ether", J. Fluor., 17(3), 249-255 (2007).
  56. Bethany B. Hueholt, Wenying Xu, Michal Sabat, B. A. DeGraff, and J. N. Demas, "Structure and Luminescence Properties of Monomeric and Dimeric Re(I) Complexes with Dicarboxylic Acid-2,2-Bipyridine Ligands", J. Fluor., 17(5), 522-527, (2007).
  57. Guoqing Zhang, Jianbin Chen, Sarah J. Payne, James N. Demas, Cassandra L. Fraser, "Multi-Emissive Difluoroboron Dibenzoylmethane Polylactide Exhibiting Intense Fluorescence and Oxygen-Sensitive Room-Temperature", J. Am. Chem. Soc., 129(29), 8942-8943(2007).
  58. Gina L. Fiore, James M. Edwards, Jessica L. Klinkenberg, Sarah J. Payne, J. N. Demas, Daniel G. Gioeli, and Cassandra L. Fraser, "Ruthenium(II) Tris(bipyridine)-centered PEI for Gene Delivery", Biomacromolecules, 8(9), 2829-2835(2007).
  59. Kaleem Morris, Michael Roach, Wenying Xu, J. N. Demas and B. A., "Luminescence Lifetime Standards for the Nanosecond to Microsecond Range and Oxygen Quenching of Ruthenium(II) Complexes", Anal. Chem., 79(24), 9310-9314 (2007).
  60. Wenying Xu, Fran Wittich, Neal Banks, James Zink, J. N. Demas and B. A. DeGraff, "Quenching of Luminescent Ruthenium(II) Complexes by Water and Relative Humidity Sensors", Appl. Spectrosc., 61(11), 1238-1245 (2007).
  61. Guoqing Zhang, Steven E. Kooi, J. N. Demas and Cassandra L. Fraser, "Tuning Emission Color with Polymer Molecular Weight for Difluoroboron Dibenzoylmethane-Polylactide", Adv. Materials, 20(11), 2099-2104 (2008).
  62. Fraser, Cassandra; Fiore, Gina; Goguen, Brenda; Klinkenberg, Jessica; Payne, Sarah; Demas, James, "Ruthenium Tris(bipyridine) Complexes with Sulfur Substituents: Model Studies for PEG Coupling", Inorg. Chem., 47(14), 6532-6540 (2008).
  63. Zhang, Guoqing; Chen, Jianbin; Payne, Sarah J.; Kooi, Steven E.; Demas, J. N.; Fraser, Cassandra L. "Multi-emissive difluoroboron dibenzoylmethane polylactide: synthesis and optical properties." Polymer Preprints (American Chemical Society, Division of Polymer Chemistry), 49(1), 258-259 (2008).
  64. Bowyer, Walter J.; Xu, Wenying; Demas, J. N. "Measuring Proton Diffusion in pH Sensor Films by Lifetimes of Luminescent Complexes Measured in the Frequency Domain", Anal. Chem., 81(1), 378-384 (2009).
  65. Sarah J. Payne, J. N. Demas, B. A. DeGraff, "Abnormal Behavior in Stern-Volmer Luminescence Quenching Measurements via Apparent Lifetime Methods", Appl. Spectrosc., in press.

 

PATENTS

  1. J. R. Bacon and J. N. Demas, "Method and Apparatus for Oxygen Determination," U.S. Patent 5,030,420. French Patent (Demande) 2,538,550, 1984.
  2. J. N. Demas, W. M. Jones, R. A. Keller, "Methods for Reduction of Quenching Errors in Luminescence Spectrometry", U.S. Patent 4,845,368.
  3. R. L Affleck, J. N. Demas, P. M. Goodwin, R. A. Keller, and Ming Wu, "Reduction of Diffusional Defocusing in Hydrodynamically Focused Flows", U. S. Patent 5,799,682 (September 1, 1998).
  4. R. L Affleck, W. P. Ambrose, J. N. Demas, P. M. Goodwin, M. E. Johnson, R. A. Keller, J. T. Petty, J. A. Schecker, and Ming Wu, "Photobleaching to Reduce or Eliminate Luminescent Impurities for Ultrasensitive Luminescence Analysis", U. S. Patents 5,827,663 (October 27, 1998) and 5,834,204 (November 11, 1998).

 

 

 

 

 

 

 

 

 

 

Hits since 1/28/00  4,004