Rajesh Ramanathan


Organic semiconductors


Our work in the area of organic semiconductors focuses on metal 7,7,8,8-tetracyanoquinodimethane (MTCNQ) materials. TCNQ is an extremely good electron acceptor and can form complexes with transition metals such as Cu, Ag, Mn, Fe, Co, Ni, Zn and Cd. These MTCNQs show unique physical, chemical and optical properties. We exploit these properties to create photoactive catalysts, photoactive antimicrobials and sensors.    


Z. Hussain, R. Ojha, D. D. La, A. Nafady, S. V. Bhosale, L. L. Martin, A. M. Bond, R. Ramanathan* and V. Bansal. Galvanic replacement of anions: a spontaneous redox reaction between TCNQ– and TCNQF40 (TCNQ=7,7,8,8-tetracyanoquinodimethane). Materials Today Chemistry, 2022, 26, 100998.

S. Balendhran, Z. Hussain, V. R. Shrestha, J. Cadusch, M. Ye, N. S. Azar, H. Kim, R. Ramanathan, J. Bullock, A. Javey, V. Bansal, and K. B. Crozier. Drop cast Copper tetracyanoquinodimethane (CuTCNQ) metal-organic semiconductor for room-temperature visible to longwave infrared photodetection. ACS Applied Materials Interfaces, 2021, 13 (32), 38544-38552.

Z. Hussain, W. Zou, B. J. Murdoch, A. Nafady, M. R. Field, R. Ramanathan* and V. Bansal. Metal–organic charge transfer complexes of Pb(TCNQ)2 and Pb(TCNQF4)2 as new catalysts for electron transfer reactions. Advanced Materials Interfaces, 2020, 7 (21): 2001111.

M. Mohammadtaheri, R. Ramanathan, S. Walia, T. Ahmed, P. Weerathunge, S. R. Anderson, M. R. Field, C. D. Dekiwadia, A. P. O’Mullane, and E. Della Gaspera, M. Bhaskaran, S. Sriram, and V. Bansal. Broadband light active MTCNQ-based metal–organic semiconducting hybrids for enhanced redox catalysis. Applied Materials Today, 2018, 13: 107-115. 

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