Patents & Publications
1. PATENTS:
1. Kim, H.-S; Helal, A. Preparation of thiazole derivatives as fluorescent chemosensors. Repub. Korean Kongkae Taeho Kongbo (2011), 32pp. CODEN: KRXXA7 KR 2011080987 A 20110713 CAN 155:182052 AN 2011:889807 CAPLUS
2. Gopal, M.; Niwas, R.; Helal, A.; Mukherjee, I. A process for the detoxification of chlorpyrifos residues in drinking water. Indian Pat. Appl. (2008), 8pp. CODEN: INXXBQ IN 2005DE03458 A 20080905 CAN 150:128233 AN 2008:1110622 CAPLUS
2. PUBLICATIONS:
1. Helal, A.; Kim, H. G.; Ghosh, M. K.; Choi, C.-H.; Kim, H.-S. New regioisomeric Naphthol-thiazole based ‘‘turn-on’’fluorescent chemosensor for Al3+. Tetrahedron, 2013, 69, 9600-9608.
2. Helal, A.; Kim, S. H.; Kim, H.-S. A Highly selective thiazole based turn-on fluorescent probe for Al3+ via Al3+ promoted hydrolysis of ester. Tetrahedron, 2013, 69, 6095-6099.
3. Helal, A.; Kim, H.-S. Carbazole incorporated ratiometric chemosensor for Zn2+. Spectrochim. Acta, Part A 2013, 105, 273-279.
4. Yi, Y. R.; Kim, K. S.; Helal, A.; Kim, H.-S. Molecular recognition of ω-amino acids by thiazolobenzocrown receptors: a GABA-selective ionophore. Supramol. Chem. 2013, 25, 16-23.
5. Park, J.; Helal, A.; Kim, H.-S.; Kim, Y. Fluorogenic assay of alkaline phosphatase activity based on the modulation of excited-state intramolecular proton transfer. Bioorg. Med. Chem. Lett. 2012, 22, 5541-5544.
6. Helal, A.; Rashid, M. H. O.; Choi, C.-H.; Kim, H.-S. New Regioisomeric Naphthol-Substituted Thiazole Based Ratiometric Fluorescence Sensor for Zn2+ with a Remarkable Red Shift in Emission Spectra. Tetrahedron 2012, 68, 647-653.
7. Helal, A.; Rashid, M. H. O.; Choi, C.-H.; Kim, H.-S. Chromogenic and fluorogenic sensing of Cu2+ based on coumarin. Tetrahedron 2011, 67, 2794-2802.
8. Helal, A.; Kim, S.; Kim, H.-S. Sensing of Cyanide Using Highly Selective Thiazole-Based Cu2+ Chemosensor. Bull. Korean Chem. Soc. 2011, 32, 3123-3126.
9. Helal, A.; Lee, S. H.; Ren, W. X.; Cho, C. S.; Kim, H.-S. Fluorescence sensing properties of 2-(2'-hydroxyphenyl)quinoline and derivatives. Bull. Korean Chem. Soc. 2011, 32, 1599-1603.
10. Helal, A.; Kim, S. H.; Kim, H.-S. Thiazole sulfonamide based ratiometric fluorescent chemosensor with a large spectral shift for zinc sensing. Tetrahedron 2010, 66, 9925-9932.
11. Helal, A.; Kim, H-S. Thiazole-based chemosensor III: Synthesis and fluorescence sensing of CH3CO2 - based on inhibition of ESIPT. Tetrahedron 2010, 66, 7097-7103.
12. Helal, A.; Lee, S. H.; Kim, S. H.; Kim, H. -S. Dual-signaling fluorescent chemosensor based on bisthiazole derivatives. Tetrahedron Lett. 2010, 51, 3531-3535.
13. Lee, S. H.; Helal, A.; Kim, H.–S. Fluorescence Sensing Properties of Thiazolobenzo-crown Ether Incorporating Coumarin. Bull. Korean Chem. Soc. 2010, 31, 615-619.
14. Helal, A.; Thao, N. T. T.; Lee, S. W.; Kim, H.-S. Thiazole-based chemosensor II: Synthesis and fluorescence sensing of fluoride ions based on inhibition of ESIPT. J. Inclusion Phenom. Macro. Chem. 2010, 66, 87-94.
15. Helal, A.; Kim, H.-S. Thiazole-Based Chemosensor: Synthesis and Ratiometric Fluorescence Sensing of Zinc. Tetrahedron Lett. 2009, 50, 5510-5515.
16. Helal, A.; Mukherjee, I.; Gopal, M.; Ameta, O. P.; Patel, B. S.; Somchoudhary, A. K. Multilocational field trials using imidacloprid as seed treatment to propose its MRL in mustard (Brassica campestris Linn.) leaves. Pestology 2005, 29, 15-20
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INTERNATIONAL/ NATIONAL ORAL AND POSTER PRESENTATIONS
Poster Presentation (National)
1. Aasif Helal, Hyun Gon Kim, Hong-Seok Kim; “Sensing of Cyanide Using Highly
2. Selective Thiazole-Based Cu2+ Chemosensor” 107th Korean Chemical Society National Meeting, October 2011, Jeju, South Korea.
3. Aasif Helal, Sang Hyun Kim, Hyun Gon Kim, Hong-Seok Kim; “Thiazole-based chemosensor: synthesis and fluorescence sensing of CH3CO2-” 106th Korean Chemical Society National Meeting, October 2010, Daegu, South Korea.
4. Aasif Helal, Sang Hyun Kim, Hyun Gon Kim, Hong-Seok Kim; “Thiazole – sulfonamide based chemosensor: synthesis and ratiometric fluorescence sensing of zinc” 106th Korean Chemical Society National Meeting, October 2010, Daegu, South Korea.
5. Aasif Helal, Sang Hyun Kim, Hyun Gon Kim, Hong-Seok Kim; “A preparative and spectroscopic study of some phenol-2-thiazole fluorophores for cation detection” 105th Korean Chemical Society National Meeting, April 2010, Incheon, South Korea.
6. Sun-min Jin, Jae Sun-Lee, Young Jae-Kang, Jae Ho-Sin, Geun Sik-Cha, Hak Hyun Nam, Aasif Helal, Hong-Seok Kim; “Ammonium ion-selective electrodes fabricated with self-assembled monolayers of ionophoric receptors based on the ion-channel mechanism” 105th Korean Chemical Society National Meeting, April 2010, Incheon, South Korea.
7. Aasif Helal, Sang Hoon Lee, Hong-Seok Kim; “Thiazole-based chemosensor for Chromogenic and Fluorogenic Sensing of Cu2+” 104th Korean Chemical Society National Meeting, October 2009, Dae Jeon, South Korea.
8. Sang Hoon Lee, Aasif Helal, Hong-Seok Kim; “Synthesis and Cation Sensing Properties of 4,4'-Bisthiazole Derivatives” 104th Korean Chemical Society National Meeting, October 2009, Dae Jeon, South Korea.
9. Aasif Helal, Sang Hoon Lee, Sang Hyun Kim, Hong-Seok Kim; “Fluorescent Sensing Properties of 2-(2-hydroxyaryl)thiazoles: A Zn2+ Selective Chemosensor” 103rd Korean Chemical Society National Meeting, April 2009, Seoul, South Korea.
10. Sun-min Jin, Jae Sun-Lee, Young Jae-Kang, Jae Ho-Sin, Geun Sik-Cha, Hak Hyun Nam, Aasif Helal, Sang Hoon Lee, Hong-Seok Kim; “Ion-channel sensing for ammonium using self-assembled monolayers modified with ionophoric receptors” 103rd Korean Chemical Society National Meeting, April 2009, Seoul, South Korea.
11. Sang Hoon Lee, Aasif Helal, Hong-Seok Kim “Fluorescent Sensing Properties of 2-(2-hydroxyaryl)quinolines” 102nd Korean Chemical Society National Meeting, October 2008, Jeju, South Korea.
12. Sun-min Jin, Hyun Soo-Jun, Young Jae-Kang, Geun Sik-Cha, Hak Hyun Nam, Sang Hoon Lee, Aasif Helal, Hong-Seok Kim; “Development of Ion Selective Electrodes using Self-Assembled Monolayers” 102nd Korean Chemical Society National Meeting, October 2008, Jeju, South Korea.
13. Aasif Helal, Sang Hoon Lee, Hong-Seok Kim; “Cation Recognition of 2(2-Hydroxynapthyl)-4-aryl-thiazoles” 101st Korean Chemical Society National Meeting, April 2008, Goyang si, South Korea.
14. Aasif Helal, Young-Mee Jung, Hong-Seok Kim; “2-(2-Hydroxyphenyl)-4-coumarinylthiazole as Selective Fluorescent Chemosensor for aluminum ion” 100th Korean Chemical Society National Meeting, October 2007, Daegu, South Korea.
15. Hong-Seok Kim, Aasif Helal, Young-Mee Jung; “Binding properties of 2-(2-tosylaminophenyl)-4-arylthiazoles toward anions” 99th Korean Chemical Society National Meeting, April 2007, Seoul, South Korea.
16. Sharaf Nawaz Khan, Aasif Helal, Hong-Seok Kim; “Efficient synthesis of 7-fluorinated steroids from 7-hydroxysterols” 97th Korean Chemical Society National Meeting, April 2006, Goyang si, South Korea.
Poster Presentation (International)
1. Hong-Seok Kim, Aasif Helal “Fused ring effect on Zn2+ sensing by thiazole based chemosensor.” 241st ACS National Meeting & Exposition, March 2011, Anaheim, CA, United States.
2. Hong-Seok Kim, Aasif Helal “Chromogenic and fluorogenic sensing of Cu2+ based on coumarin.” 241st ACS National Meeting & Exposition, March 2011, Anaheim, CA, United States.
3. Hong-Seok Kim, Aasif Helal, Sang Hyun Kim, Hyun Gon Kim; “Thiazole-based chemosensor: synthesis and fluorescence sensing of CH3CO2-” PACIFICHEM 2010, December 2010, Honolulu, Hawaii.
4. Hong-Seok Kim, Aasif Helal, Sang Hoon Lee, Sang Hyun Kim; “Chromogenic and Fluorogenic Sensing of Cu2+ based on Thiazole Derivatives” The 4th International Conference on Cutting-Edge Organic Chemistry in Asia (ICCEOCA-4), November 2009, Bangkok, Thailand.
5. Aasif Helal, Hong-Seok Kim; “Thiazole-based chemosensor: Synthesis and ratiometric fluorescence sensing of zinc” Calix 2009, 10th International Conference on Calixarenes (ICC), 2009, Seoul, Korea.
6. Aasif Helal, Nugen Thi Thu Thao, Hong-Seok Kim; “A New fluorescence chemosensor for fluoride anion based on thiazole derivatives” Calix 2009, 10th International Conference on Calixarenes(ICC), 2009, Seoul, Korea.
7. Aasif Helal, Sang Hoon Lee, Hong-Seok Kim, “Synthesis and anion binding property of o-Hydroxyphenylthiazoles” 17th International Conference on Organic Synthesis (IUPAC/ICOS-17), 2008, Daejeon, South Korea.
8. Hyun-Chul Kim, Soo-Keun Lee, Won Bae Jeon, Ki-Soo Kim, Aasif Helal, Sang Won Jeong, Hong-Seok Kim; “Immobilization of Antibodies on a Self-assembled Monolayer of a Thiazole-Containing Dibenzo-18-crown-6 Derivative and Detection of C-reactive Protein” 12th Asian Pacific Confederation of Chemical Engineering Congress, 2008, Dalian, China.
Oral presentation
Aasif Helal, Hong-Seok Kim; “Thiazole-based chemosensor: Synthesis and ratiometric fluorescence sensing of zinc” 1st Daegu-Gyungbuk KCS Regional Meeting, Daegu, Korea.