Patents by Inventor Kannan Muthukumaran

Kannan Muthukumaran has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Synthesis of phosphono-substituted porphyrin compounds for attachment to metal oxide surfaces
    Patent number: 8445695
    Abstract: A method of making a phosphono-substituted dipyrromethane comprises reacting an aldehyde or acetal having at least one phosphono group substituted thereon with pyrrole to produce a phosphono-substituted dipyrromethane; and wherein the phosphono is selected from the group consisting of dialkyl phosphono, diaryl phosphono, and dialkylaryl phosphono. Additional methods, intermediates and products are also described.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: May 21, 2013
    Assignees: North Carolina State University, ZettaCore, Inc.
    Inventors: Jonathan S. Lindsey, Robert S. Loewe, Kannan Muthukumaran, Arounaguiry Ambroise
  • Formyl- and acetal-porphyrins bearing tripodal linking groups
    Patent number: 8420804
    Abstract: A method of making a 5-formylporphyrin, comprises the steps of: condensing a 5-acetaldipyrromethane with a dipyrromethane-1,9-dicarbinol to produce a porphyrin having an acetal group substituted thereon at the 5 position; and then hydrolyzing said porphyrin to produce said 5-formylporphyrin. Products and intermediates useful in such methods, along with methods of making such intermediates, are also described.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: April 16, 2013
    Assignee: North Carolina State University
    Inventors: Arumugham Balakumar, Kannan Muthukumaran, Jonathan S. Lindsey
  • Synthesis of Phosphono-Substituted Porphyrin Compounds for Attachment to Metal Oxide Surfaces
    Publication number: 20120322999
    Abstract: A method of making a phosphono-substituted dipyrromethane comprises reacting an aldehyde or acetal having at least one phosphono group substituted thereon with pyrrole to produce a phosphono-substituted dipyrromethane; and wherein the phosphono is selected from the group consisting of dialkyl phosphono, diaryl phosphono, and dialkylaryl phosphono. Additional methods, intermediates and products are also described.
    Type: Application
    Filed: August 29, 2012
    Publication date: December 20, 2012
    Inventors: Jonathan S. Lindsey, Robert S. Loewe, Kannan Muthukumaran, Arounaguiry Ambroise
  • Synthesis of phosphono-substituted porphyrin compounds for attachment to metal oxide surfaces
    Patent number: 8278439
    Abstract: A method of making a phosphono-substituted dipyrromethane comprises reacting an aldehyde or acetal having at least one phosphono group substituted thereon with pyrrole to produce a phosphono-substituted dipyrromethane; and wherein the phosphono is selected from the group consisting of dialkyl phosphono, diaryl phosphono, and dialkylaryl phosphono. Additional methods, intermediates and products are also described.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: October 2, 2012
    Assignees: North Carolina State University, ZettaCore, Inc.
    Inventors: Jonathan S. Lindsey, Robert S. Loewe, Kannan Muthukumaran, Arounaguiry Ambroise
  • METHODS AND INTERMEDIATES FOR THE SYNTHESIS OF DIPYRRIN-SUBSTITUTED PORPHYRINIC MACROCYCLES
    Publication number: 20120126214
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Application
    Filed: January 27, 2012
    Publication date: May 24, 2012
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey
  • SYNTHESIS OF PHOSPHONO-SUBSTITUTED PORPHYRIN COMPOUNDS FOR ATTACHMENT TO METAL OXIDE SURFACES
    Publication number: 20120065391
    Abstract: A method of making a phosphono-substituted dipyrromethane comprises reacting an aldehyde or acetal having at least one phosphono group substituted thereon with pyrrole to produce a phosphono-substituted dipyrromethane; and wherein the phosphono is selected from the group consisting of dialkyl phosphono, diaryl phosphono, and dialkylaryl phosphono. Additional methods, intermediates and products are also described.
    Type: Application
    Filed: November 18, 2011
    Publication date: March 15, 2012
    Inventors: Jonathan S. Lindsey, Robert S. Loewe, Kannan Muthukumaran, Arounaguiry Ambroise
  • Methods and intermediates for the synthesis of dipyrrin-substituted porphyrinic macrocycles
    Patent number: 8129520
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: March 6, 2012
    Assignee: North Carolina State University
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey
  • Synthesis of phosphono-substituted porphyrin compounds for attachment to metal oxide surfaces
    Patent number: 8080653
    Abstract: A method of making a phosphono-substituted dipyrromethane comprises reacting an aldehyde or acetal having at least one phosphono group substituted thereon with pyrrole to produce a phosphono-substituted dipyrromethane; and wherein the phosphono is selected from the group consisting of dialkyl phosphono, diaryl phosphono, and dialkylaryl phosphono. Additional methods, intermediates and products are also described.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: December 20, 2011
    Assignees: North Carolina State University, Zettacore, Inc.
    Inventors: Jonathan S. Lindsey, Robert S. Loewe, Kannan Muthukumaran, Arounaguiry Ambroise
  • METHODS AND INTERMEDIATES FOR THE SYNTHESIS OF DIPYRRIN-SUBSTITUTED PORPHYRINIC MACROCYCLES
    Publication number: 20110197969
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Application
    Filed: April 14, 2011
    Publication date: August 18, 2011
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey
  • NEW ROUTE TO FORMYL-PORPHYRINS
    Publication number: 20110152515
    Abstract: A method of making a 5-formylporphyrin, comprises the steps of: condensing a 5-acetaldipyrromethane with a dipyrromethane-1,9-dicarbinol to produce a porphyrin having an acetal group substituted thereon at the 5 position; and then hydrolyzing said porphyrin to produce said 5-formylporphyrin. Products and intetinediates useful in such methods, along with methods of making such intermediates, are also described.
    Type: Application
    Filed: February 25, 2011
    Publication date: June 23, 2011
    Inventors: Arumugham Balakumar, Kannan Muthukumaran, Jonathan S. Lindsey
  • Methods and intermediates for the synthesis of dipyrrin-substituted porphyrinic macrocycles
    Patent number: 7947828
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Grant
    Filed: April 8, 2010
    Date of Patent: May 24, 2011
    Assignee: North Carolina State University
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey
  • Route to formyl-porphyrins
    Patent number: 7919615
    Abstract: A method of making a 5-formylporphyrin, comprises the steps of: condensing a 5-acetaldipyrromethane with a dipyrromethane-1,9-dicarbinol to produce a porphyrin having an acetal group substituted thereon at the 5 position; and then hydrolyzing said porphyrin to produce said 5-formylporphyrin. Products and intermediates useful in such methods, along with methods of making such intermediates, are also described.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: April 5, 2011
    Assignee: North Carolina State University
    Inventors: Arumugham Balakumar, Kannan Muthukumaran, Jonathan S. Lindsey
  • METHODS AND INTERMEDIATES FOR THE SYNTHESIS OF DIPYRRIN-SUBSTITUTED PORPHYRINIC MACROCYCLES
    Publication number: 20100200066
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Application
    Filed: April 8, 2010
    Publication date: August 12, 2010
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey
  • Methods and intermediates for the synthesis of dipyrrin-substituted porphyrinic macrocycles
    Patent number: 7723513
    Abstract: The present invention provides dipyrrin substituted porphyrinic macrocycles, intermediates useful for making the same, and methods of making the same. Such compounds may be used for purposes including the making of molecular memory devices, solar cells and light harvesting arrays.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: May 25, 2010
    Assignee: North Carolina State University
    Inventors: Lianhe Yu, Kannan Muthukumaran, Prathapan Sreedharan, Jonathan S. Lindsey
  • Boron complexation strategy for use in manipulating 1-acyldipyrromethanes
    Patent number: 7595407
    Abstract: A method of making a metal complex comprises combining a 1-monoacyldipyrromethane with a compound of the formula R1R2MX, wherein M is boron, R1 and R2 are each independently organic substituents; and X is an anion leaving group; to produce a metal complex of the formula DMR1R2 wherein DH is a 1-monoacyldipyrromethane. The methods and complexes are useful for the purification and synthesis of dipyrromethanes and porphyrins.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: September 29, 2009
    Assignee: North Carolina State University
    Inventors: Jonathan S. Lindsey, Kannan Muthukumaran, Marcin Ptaszek, H. Z. Syeda Huma
  • SYNTHESIS OF PHOSPHONO-SUBSTITUTED PORPHYRIN COMPOUNDS FOR ATTACHMENT TO METAL OXIDE SURFACES
    Publication number: 20090234136
    Abstract: A method of making a phosphono-substituted dipyrromethane comprises reacting an aldehyde or acetal having at least one phosphono group substituted thereon with pyrrole to produce a phosphono-substituted dipyrromethane; and wherein the phosphono is selected from the group consisting of dialkyl phosphono, diaryl phosphono, and dialkylaryl phosphono. Additional methods, intermediates and products are also described.
    Type: Application
    Filed: May 28, 2009
    Publication date: September 17, 2009
    Inventors: Jonathan S. Lindsey, Robert S. Loewe, Kannan Muthukumaran, Arounaguiry Ambroise
  • Synthesis of phosphono-substituted porphyrin compounds for attachment to metal oxide surfaces
    Patent number: 7553977
    Abstract: A method of making a phosphono-substituted dipyrromethane comprises reacting an aldehyde or acetal having at least one phosphono group substituted thereon with pyrrole to produce a phosphono-substituted dipyrromethane; and wherein the phosphono is selected from the group consisting of dialkyl phosphono, diaryl phosphono, and dialkylaryl phosphono. Additional methods, intermediates and products are also described.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: June 30, 2009
    Assignees: North Carolina State University, ZettaCore, Inc.
    Inventors: Jonathan S. Lindsey, Robert S. Loewe, Kannan Muthukumaran, Arounaguiry Ambroise
  • NEW ROUTE TO FORMYL-PORPHYRINS
    Publication number: 20090137795
    Abstract: A method of making a 5-formylporphyrin, comprises the steps of: condensing a 5-acetaldipyrromethane with a dipyrromethane-1,9-dicarbinol to produce a porphyrin having an acetal group substituted thereon at the 5 position; and then hydrolyzing said porphyrin to produce said 5-formylporphyrin. Products and intermediates useful in such methods, along with methods of making such intermediates, are also described.
    Type: Application
    Filed: January 30, 2009
    Publication date: May 28, 2009
    Applicant: North Carolina State University
    Inventors: Arumugham Balakumar, Kannan Muthukumaran, Jonathan S. Lindsey
  • Route to formyl-porphyrins
    Patent number: 7501507
    Abstract: A method of making a 5-formylporphyrin, comprises the steps of: condensing a 5-acetaldipyrromethane with a dipyrromethane-1,9-dicarbinol to produce a porphyrin having an acetal group substituted thereon at the 5 position; and then hydrolyzing said porphyrin to produce said 5-formylporphyrin. Products and intermediates useful in such methods, along with methods of making such intermediates, are also described.
    Type: Grant
    Filed: June 14, 2004
    Date of Patent: March 10, 2009
    Assignee: North Carolina State University
    Inventors: Arumugham Balakumar, Kannan Muthukumaran, Jonathan S. Lindsey
  • Synthesis of Phosphono-Substituted Porphyrin Compounds for Attachment to Metal Oxide Surfaces
    Publication number: 20080269501
    Abstract: A method of making a phosphono-substituted dipyrromethane comprises reacting an aldehyde or acetal having at least one phosphono group substituted thereon with pyrrole to produce a phosphono-substituted dipyrromethane; and wherein the phosphono is selected from the group consisting of dialkyl phosphono, diaryl phosphono, and dialkylaryl phosphono. Additional methods, intermediates and products are also described.
    Type: Application
    Filed: November 9, 2007
    Publication date: October 30, 2008
    Applicants: North Carolina State University, ZettaCore, Inc.
    Inventors: Jonathan S. Lindsey, Robert S. Loewe, Kannan Muthukumaran, Arounaguiry Ambroise