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Ramakrishna Y, Naresh M, Mrinalini M, Pravallika N, Kumari P, Bhavani B, Giribabu L, Prasanthkumar S. Narcissistic self-sorting in Zn(II) porphyrin derived semiconducting nanostructures. Nanoscale 2024. [PMID: 38683187 DOI: 10.1039/d4nr00991f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
The narcissistic self-sorted phenomenon is explicitly attributed to the structural similarities in organic molecules. Although such relevant materials are rarely explored, self-sorted structures from macrocyclic π-conjugated-based p- and n-type organic semiconductors facilitate the increase of exciton dissociation and charge separation in bulk heterojunction solar cells. Herein, we report two extended π-conjugated derivatives consisting of zinc-porphyrin-linked benzothiadiazole acting as an acceptor (PB) and anthracene as a donor (PA). Despite having the same porphyrin π-conjugated core in PA and PB, variations in donor and acceptor moieties make the molecular packing form one-dimensional (1D) self-assembled nanofibers via H- and J-type aggregates. Interestingly, a dissimilar aggregate of PA and PB exists as a mixture (PA + PB), promoting narcissistic self-sorted structures. Electrochemical impedance investigation reveals that the electronic characteristics of self-sorting assemblies are influenced by the difference in electrostatic potentials for PA and PB, resulting in a transitional electrical conductivity of 0.14 S cm-1. Therefore, the design of such materials for the fabrication of effective photovoltaics is promoted by these extraordinary self-sorted behaviors in comparable organic π-conjugated molecules.
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Affiliation(s)
- Yelukula Ramakrishna
- Department of Polymer & Functional Materials, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
| | - Madarapu Naresh
- Department of Polymer & Functional Materials, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
| | - Madoori Mrinalini
- Department of Polymer & Functional Materials, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology (IMMT), Bhubaneswar - 751 013, Odisha, India
| | - Nagadatta Pravallika
- Department of Polymer & Functional Materials, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
| | - Priti Kumari
- Department of Polymer & Functional Materials, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
| | - Botta Bhavani
- Department of Polymer & Functional Materials, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
| | - Lingamallu Giribabu
- Department of Polymer & Functional Materials, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
| | - Seelam Prasanthkumar
- Department of Polymer & Functional Materials, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
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Karmakar S, Sukumar G, Prasanthkumar S, Jha BK, Mainkar PS, Nayani K, Chandrasekhar S. Metal-free functionalization of tyrosine residues in short peptides and study of the morphological alterations. Chem Commun (Camb) 2024; 60:3802-3805. [PMID: 38487891 DOI: 10.1039/d3cc06115a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
An efficient functionalization of tyrosine residues in phenolic regions is achieved under metal-free conditions. The strategy involves the conversion of a tyrosine residue to 4-amino phenylalanine or 4-amino-3-methoxy phenylalanine in short peptides through a controlled oxidative dearomatization. This transformation is achieved in one pot with good yields and excellent regioselectivity. Consequently, the self-assembly of the peptide compounds has been studied at the nanoscopic level before and after functionalization. The results suggest that the peptide derivatives comprising amide groups promote intermolecular H-bonding interactions and the difference in -OH and -NH2 functional groups is found to be responsible for the morphological changes. Morphological transitions from 1D nanowires to 2D nanosheets were observed during functional group modification.
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Affiliation(s)
- Santanu Karmakar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Genji Sukumar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
- Department of Chemistry, Adikavi Nannaya University, Rajamahendravaram, Andhra Pradesh 533296, India
| | - Seelam Prasanthkumar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
- Department of Polymers and Functional Materials, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Babli K Jha
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Prathama S Mainkar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kiranmai Nayani
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Srivari Chandrasekhar
- Department of Organic Synthesis and Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Ramakrishna Y, Naresh M, Bhavani B, Prasanthkumar S. Conducting 1D nanostructures from light-stimulated copper-metalated porphyrin-dibenzothiophene. Phys Chem Chem Phys 2023; 25:24539-24546. [PMID: 37661730 DOI: 10.1039/d3cp02990e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Control over the dimensionality of stimulated organic semiconductors has aroused significant interest in organic electronics; however, the design of such materials still remains to be decided. Herein, we have developed three dibenzothiophene-appended freebase, zinc-metalated and copper-metalated porphyrin derivatives (PFb-DBT, PZn-DBT and PCu-DBT) in which PCu-DBT leads to an anion-binding complex in chloroform upon the application of light, resulting in self-assembled 1D nanostructures with high electrical conductivity. Nevertheless, light-stimulated freebase and zinc-metalated P-DBT undergo protonation and demetalation. Electron microscopic images displayed the anion-binding-assisted 1D nanostructure using weak non-covalent interactions, which promotes enhancement in electrical conductivity among other things, as confirmed by electrochemical impedance spectra. Thus, the generation of well-defined nanostructures with improved electronic characteristics from stimuli-responsive organic dyes suggests the importance of developing various smart materials for efficient field effect transistors and sensors.
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Affiliation(s)
- Yelukala Ramakrishna
- Polymer & Functional Materials Division CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
| | - Madarapu Naresh
- Polymer & Functional Materials Division CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
| | - Botta Bhavani
- Polymer & Functional Materials Division CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
| | - Seelam Prasanthkumar
- Polymer & Functional Materials Division CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
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Babu R, López-Fernández I, Prasanthkumar S, Polavarapu L. All-Inorganic Lead-Free Doped-Metal Halides for Bright Solid-State Emission from Primary Colors to White Light. ACS Appl Mater Interfaces 2023; 15:35206-35215. [PMID: 37459212 PMCID: PMC10375434 DOI: 10.1021/acsami.3c06546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/28/2023]
Abstract
Metal halides have been explored with the aid of strong photoluminescence for optical and optoelectronic applications. However, the preparation of lead (Pb)-free solid-state emitters with high photoluminescence quantum yields (PLQYs) and tunable emission remains exceptionally challenging. Herein, we report metal ion (Cu(I), Mn(II), and Sn(II))-doped Cs3ZnI5 single crystals that are primary color (violet, green, and orange/red) emitters with extremely high PLQYs. Whereas the Mn-doping leads to bright green emissions with 100% PLQY, the Cu- and Sn-doping give rise to blue and red emissions with PLQYs of 57 and 64%, respectively. Interestingly, higher Mn doping results in white light emissive crystals as a side product, which are found to be Mn-doped CsI single crystals. The bright white light emissive crystals can be synthesized in a pure form in large quantities and exhibit a high color rendering index (CRI) of 78 and CIE coordinates of (0.30, 0.38), which are close to daylight conditions. To the best of our knowledge, this is the first demonstration of white light emission from a complete inorganic system. Importantly, the single crystals of all colors exhibit high long-term stability as their PLQY remains unchanged even after 2 months of preparation, and are thermally stable up to 600 °C.
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Affiliation(s)
- Ramavath Babu
- School of Chemistry, University of Hyderabad, Gachibowli, Hyderabad 500 046, India
| | - Iago López-Fernández
- CINBIO, Materials Chemistry and Physics Group, University of Vigo, Campus Universitario Marcosende, Vigo 36310, Spain
| | - Seelam Prasanthkumar
- Polymer and Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Uppal Road, Hyderabad 500 007, India
- Academy of Scientific and Industrial Research (AcSIR), Ghaziabad, Uttar Pradesh 201 002, India
| | - Lakshminarayana Polavarapu
- CINBIO, Materials Chemistry and Physics Group, University of Vigo, Campus Universitario Marcosende, Vigo 36310, Spain
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Ahmed MS, Biswas C, Bhavani B, Prasanthkumar S, Banerjee D, Kumar V, Chetti P, Giribabu L, Rao Soma V, Raavi SSK. Metalated porphyrin-napthalimide based donor-acceptor systems with long-lived triplet states and effective three-photon absorption. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
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Ghosh S, Prasanthkumar S, Das S, Saeki A, Seki S, Ajayaghosh A. Structurally directed thienylenevinylene self–assembly for improved charge carrier mobility: 2D sheets vs 1D fibers. Chem Commun (Camb) 2022; 58:6837-6840. [DOI: 10.1039/d2cc02111k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High charge carrier mobility is a prerequisite for organic electronics for which molecular arrangement and morphology plays a vital role. Herein, we report how the self-assembly of thienylenevinylenes T1 and...
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Bhavani B, Chanda N, Kotha V, Reddy G, Basak P, Pal U, Giribabu L, Prasanthkumar S. 1D alignment of Co(II) metalated porphyrin-napthalimide based self-assembled nanowires for photocatalytic hydrogen evolution. Nanoscale 2021; 14:140-146. [PMID: 34904615 DOI: 10.1039/d1nr06961f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The splitting of water into hydrogen and oxygen under visible light is an emerging phenomenon in green energy technology. Nevertheless, selecting an appropriate photocatalyst is rather significant to enhance hydrogen production on a large scale. In this context, organic photocatalysts have received considerable attention owing to their larger surface area, control in diffusion adsorption, nanostructures and electronic properties. Herein, we have developed five either free base or transition metalated porphyrin-napthalimide based donor-acceptor systems (PN1-PN5) and studied their morphology, electronic properties and catalytic behaviour. Detailed studies suggest that the Co(II) substituent D-A system (PN2) displayed a well-aligned one-dimensional (1D) nanowire with high electrical conductivity promoting remarkable photocatalytic hydrogen production rate (18 mM g-1 h-1) when compared to that of porphyrin-based derivatives reported until now. Thus, these results propose to investigate diverse metalated π-conjugated materials as photocatalysts for hydrogen production.
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Affiliation(s)
- Botta Bhavani
- Polymer & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
| | - Nageshwarrao Chanda
- Polymer & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
| | - Vishal Kotha
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, Maharastra, India
| | - Govind Reddy
- Polymer & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
| | - Pratyay Basak
- Polymer & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
| | - Ujjwal Pal
- Polymer & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
| | - Lingamallu Giribabu
- Polymer & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
| | - Seelam Prasanthkumar
- Polymer & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad-201 002, India
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Abstract
Tetrapyrrolic systems largely inspired by nature have attracted much attention in organic electronics and biomedical applications owing to their planar structure and extended [Formula: see text]-conjugated double bonds. As a result, delocalization of [Formula: see text]-electron cloud leads the excellent optical absorption and fluorescent properties. Nonetheless, the utilization of non-covalent interactions result in the self-assembled nanostructures providing applications in bioimaging and electronics. In this review, it is demonstrated that the recent reports on the self-assembly in tetrapyrrolic systems via supramolecular interactions lead to well-defined nanoarchitectures. Moreover, the importance of porphyrin based derivatives in nanoelectronics and chemotherapeutic applications is reported. Therefore, the inclination of tetrapyrroles towards the design and development of novel supramolecular nanostructures are considered the hallmark for nanorobotics, shape memory polymers and bionic arms.
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Affiliation(s)
- Madoori Mrinalini
- Polymer and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Madarapu Naresh
- Polymer and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
| | - Seelam Prasanthkumar
- Polymer and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Lingamallu Giribabu
- Polymer and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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Devulapally K, Reddy G, Prasanthkumar S, Jagadeesh A, Soman S, Giribabu L. Effect of auxiliary acceptor on D-π-A based porphyrin sensitizers for dye sensitized solar cells. J PORPHYR PHTHALOCYA 2021. [DOI: 10.1142/s1088424621500127] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Among the tetrapyrrolic class of compounds, porphyrin based sensitizers have attracted considerable attention due to their excellent performance in dye-sensitized solar cells (DSSCs). Herein, two new donor-[Formula: see text]-acceptor (D-[Formula: see text]-A) concept based porphyrin sensitizers having donor 3-ethynylphenothiazine tethered at meso- position, zinc porphyrin as [Formula: see text]-spacer and acceptor either 3-(4-(benzo[c][1,2,5]thiadiazol-4-yl)phenyl)-2-cyanoacrylic acid (LG22), and 3-(4-(benzo[c][1,2,5]thiadiazol-4-yl)thiophene-2-yl)-2-cyanoacrylicacid (LG23) were designed and synthesized. Both sensitizers were characterized by various spectroscopic techniques and electrochemical methods. Optical, electrochemical and optimized studies suggest that these dyes are suitable for sensitization of nanocrystalline TiO2. The optimized device studies showed the power conversion efficiencies (PCE) of 1.86% and 1.37% for LG22 and LG23 dyes, respectively using [Formula: see text]/[Formula: see text] liquid redox shuttle. Finally, Charge Extraction (CE), Intensity Modulated Photovoltage Spectroscopy (IMVS), Intensity Modulated Photocurrent Spectroscopy (IMPS) and Open Circuit Voltage Decay (OCVD) measurements were adopted to understand in detail the electron transfer properties at various interfaces in a way to understand the performance limiting processes in these novel porphyrin sensitizers.
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Affiliation(s)
- Koteshwar Devulapally
- Polymer and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, New Delhi 201002, India
| | - Govind Reddy
- Polymer and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
| | - Seelam Prasanthkumar
- Polymer and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, New Delhi 201002, India
| | - Anooja Jagadeesh
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, New Delhi 201002, India
| | - Suraj Soman
- Photosciences and Photonics Section, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, New Delhi 201002, India
| | - Lingamallu Giribabu
- Polymer and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, New Delhi 201002, India
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Gangadhar PS, Reddy G, Prasanthkumar S, Giribabu L. Phenothiazine functional materials for organic optoelectronic applications. Phys Chem Chem Phys 2021; 23:14969-14996. [PMID: 34231592 DOI: 10.1039/d1cp01185e] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Phenothiazine (PTZ) is one of the most extensively investigated S, N heterocyclic aromatic hydrocarbons due to its unique optical, electronic properties, flexibility of functionalization, low cost, and commercial availability. Hence, PTZ and its derivative materials have been attractive in various optoelectronic applications in the last few years. In this prospective, we have focused on the most significant characteristics of PTZ and highlighted how the structural modifications such as different electron donors or acceptors, length of the π-conjugated system or spacers, polar or non-polar chains, and other functional groups influence the optoelectronic properties. This prospective provides a recent account of the advances in phenothiazine derivative materials as an active layer(s) for optoelectronic (viz. dye sensitized solar cells (DSSCs), perovskite solar cells (PSCs), organic solar cells (OSCs), organic light-emitting diodes (OLEDs), organic field-effect transistor (OFETs), chemosensing, nonlinear optical materials (NLOs), and supramolecular self-assembly applications. Finally, future prospects are discussed based on the structure-property relationship in PTZ-derivative materials. This overview will pave the way for researchers to design and develop new PTZ-functionalized structures and use them for various organic optoelectronic applications.
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Affiliation(s)
- Palivela Siva Gangadhar
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, TS, India. and Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, 201002, India
| | - Govind Reddy
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, TS, India.
| | - Seelam Prasanthkumar
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, TS, India. and Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, 201002, India
| | - Lingamallu Giribabu
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, TS, India. and Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, 201002, India
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Anitha T, Mrinalini M, Vani D, Prasanthkumar S, Rajender Reddy K, Giribabu L. Synthesis and Opto-electronic Properties of BODIPY o-OPhos Systems. Photochem Photobiol 2020; 96:1182-1190. [PMID: 32621763 DOI: 10.1111/php.13306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 06/25/2020] [Indexed: 11/26/2022]
Abstract
Herein, we report the versatile synthetic strategy and opto-electronic properties for the phosphorylation of BODIPY derivatives 5aa-5ak by substituting with an electron-donating/withdrawing group at the ortho position. Nevertheless, this new methodology relatively promotes the tolerance of the aldehyde moiety and the high yield for the synthesis of BODIPY o-OPhos derivatives. The photophysical studies suggest improved optical properties due to the inductive effect of various electron-donating/withdrawing groups. The UV-visible and the emission data suggest that BODIPY o-OPhos derivatives emphasize the property of the excited states with an increase in fluorescence intensity and high quantum yields due to the presence of bulky phospsho-triester at the meso- position which hinders the free rotation around the C-Ar bond and facilitates the development of OLEDs and various organophosphorus warfare agents. Electrochemical studies reveal 5ak depicts the ease of redox activity amongst the 5aa-5ak derivatives. The density functional theory indicates the highest occupied molecular orbital on the BODIPY moiety whereas the lowest unoccupied molecular orbital delocalized on BODIPY and the phospho-triester moieties. Thus, the unique development of the novel BODIPY derivatives with improved optical and redox properties pave the way for fluorescent probes and bioimaging techniques.
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Affiliation(s)
- Thipanni Anitha
- Catalysis & Fine Chemicals Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad, Telangana, India.,Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, New Delhi, India
| | - Madoori Mrinalini
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, New Delhi, India.,Polymer & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad, Telangana, India
| | - Damera Vani
- Catalysis & Fine Chemicals Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad, Telangana, India.,Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, New Delhi, India
| | - Seelam Prasanthkumar
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, New Delhi, India.,Polymer & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad, Telangana, India
| | - Kallu Rajender Reddy
- Catalysis & Fine Chemicals Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad, Telangana, India.,Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, New Delhi, India
| | - Lingamallu Giribabu
- Academy of Scientific and Innovation Research (AcSIR), Ghaziabad, New Delhi, India.,Polymer & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad, Telangana, India
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Reddy CR, Aila M, Sathish P, Mrinalini M, Giribabu L, Prasanthkumar S, Grée R. Metal-free propargylation/aza-annulation approach to substituted β-carbolines and evaluation of their photophysical properties. Org Biomol Chem 2019; 17:9291-9304. [PMID: 31626261 DOI: 10.1039/c9ob01959f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An efficient acid-catalyzed propargylation/aza-annulation sequence was developed under metal-free reaction conditions, thus leading to a one-pot synthesis of a variety of substituted β-carbolines starting from propargylic alcohols and indole 2-carbonyls. This versatile strategy was further extended to the synthesis of 5-azaindoles and 5-azabenzothiazoles. Optical properties suggested that manipulation of electron donor and acceptor moieties on β-carbolines has an impact on their ground and excited state electronic behavior. This leads to blue or green emission and should facilitate the development of organic light emitting diodes (OLEDs). Electrochemical and stability studies revealed that 4a-6 shows ease of redox activity and photostability during illumination.
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Affiliation(s)
- Chada Raji Reddy
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad - 500007, India.
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Mrinalini M, Prasanthkumar S. Recent Advances on Stimuli‐Responsive Smart Materials and their Applications. Chempluschem 2019; 84:1103-1121. [DOI: 10.1002/cplu.201900365] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/25/2019] [Indexed: 12/25/2022]
Affiliation(s)
- Madoori Mrinalini
- Polymers & Functional Materials DivisionCSIR-Indian Institute of Chemical Technology (IICT) Tarnaka Hyderabad- 500007, Telangana India
- Academy of Scientific and Innovation Research (AcSIR) Kamla Nehru Nagar, Ghaziabad Uttar Pradesh 201002 India
| | - Seelam Prasanthkumar
- Polymers & Functional Materials DivisionCSIR-Indian Institute of Chemical Technology (IICT) Tarnaka Hyderabad- 500007, Telangana India
- Academy of Scientific and Innovation Research (AcSIR) Kamla Nehru Nagar, Ghaziabad Uttar Pradesh 201002 India
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Mrinalini M, Pathak SS, Achary BS, Panchakarla LS, Prasanthkumar S. Voltage Stimulated Anion Binding of Metalloporphyrin-induced Crystalline 2D Nanoflakes. Chem Asian J 2019; 14:537-541. [PMID: 30632278 DOI: 10.1002/asia.201801794] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 01/04/2019] [Indexed: 12/22/2022]
Abstract
Voltage-stimulated redox-active materials have received significant attention in the field of organic electronics and sensor technology. Such stimuli-responsive materials trigger the formation of crystalline nanostructures and facilitate the design of efficient smart devices hitherto unknown. Herein, we report that free-base and metallo-tetratolylporphyrin-linked ferrocene derivatives (H2 TTP-Fc and ZnTTP-Fc) undergo distinct proton/anion binding mechanism in CHCl3 during bulk electrolysis at applied voltage of 1.4 V to give [H4 TTP-Fc]+ Cl- and H+ [(Cl)ZnTTP-Fc]- followed by nanospheres and crystalline 2D nanoflakes formation, confirmed by SEM and TEM images, by methanol vapor diffusion (MVD) approach. Moreover, X-ray diffraction analysis suggest that protonated H2 TTP-Fc aggregates exhibit amorphous nature, whereas H+ [(Cl)ZnTTP-Fc]- depict crystalline nature from layer-by-layer arrangement of nanoflakes assisted by π-π stacking and ion-dipole interactions.
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Affiliation(s)
- Madoori Mrinalini
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-, 500007, Telangana, India.,Academy of Scientific and Innovation Research (AcSIR), New Delhi, India
| | - Sushil Swaroop Pathak
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-, 400076, Maharastra, India
| | - B Shivaprasad Achary
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-, 500007, Telangana, India
| | - Leela S Panchakarla
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-, 400076, Maharastra, India
| | - Seelam Prasanthkumar
- Polymers & Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-, 500007, Telangana, India.,Academy of Scientific and Innovation Research (AcSIR), New Delhi, India
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Mrinalini M, Islavath N, Prasanthkumar S, Giribabu L. Stipulating Low Production Cost Solar Cells All Set to Retail…! CHEM REC 2018; 19:661-674. [DOI: 10.1002/tcr.201800106] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 09/12/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Madoori Mrinalini
- Polymer and Functional Materials DivisionCSIR-Indian Institute of Chemical Technology (IICT), Tarnaka Hyderabad- 500007 Telangana India
- Academy of Scientific and Innovation Research (AcSIR) New Delhi
| | - Nanaji Islavath
- Polymer and Functional Materials DivisionCSIR-Indian Institute of Chemical Technology (IICT), Tarnaka Hyderabad- 500007 Telangana India
| | - Seelam Prasanthkumar
- Polymer and Functional Materials DivisionCSIR-Indian Institute of Chemical Technology (IICT), Tarnaka Hyderabad- 500007 Telangana India
- Academy of Scientific and Innovation Research (AcSIR) New Delhi
| | - Lingamallu Giribabu
- Polymer and Functional Materials DivisionCSIR-Indian Institute of Chemical Technology (IICT), Tarnaka Hyderabad- 500007 Telangana India
- Academy of Scientific and Innovation Research (AcSIR) New Delhi
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Krishna NV, Krishna JVS, Mrinalini M, Prasanthkumar S, Giribabu L. Role of Co-Sensitizers in Dye-Sensitized Solar Cells. ChemSusChem 2017; 10:4668-4689. [PMID: 28921883 DOI: 10.1002/cssc.201701224] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 09/07/2017] [Indexed: 06/07/2023]
Abstract
Co-sensitization is a popular route towards improved efficiency and stability of dye-sensitized solar cells (DSSCs). In this context, the power conversion efficiency (PCE) values of DSSCs incorporating Ru- and porphyrin-based dyes can be improved from 8-11 % to 11-14 % after the addition of additives, co-adsorbents, and co-sensitizers that reduce aggregation and charge recombination in the device. Among the three supporting material types, co-sensitizers play a major role to enhance the performance and stability of DSSCs, which is requried for commercialization. In this Minireview, we highlight the role co-sensitizers play in improving photovoltaic performance of devices containing Ru- and porphyrin-based sensitizers.
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Affiliation(s)
- Narra Vamsi Krishna
- Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad, 500007, Telangana, India
- Academy of Scientific and Innovation Research (AcSIR), New Delhi, India
| | - Jonnadula Venkata Suman Krishna
- Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad, 500007, Telangana, India
- Academy of Scientific and Innovation Research (AcSIR), New Delhi, India
| | - Madoori Mrinalini
- Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad, 500007, Telangana, India
- Academy of Scientific and Innovation Research (AcSIR), New Delhi, India
| | - Seelam Prasanthkumar
- Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad, 500007, Telangana, India
- Academy of Scientific and Innovation Research (AcSIR), New Delhi, India
| | - Lingamallu Giribabu
- Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad, 500007, Telangana, India
- Academy of Scientific and Innovation Research (AcSIR), New Delhi, India
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Mrinalini M, Vamsi Krishna N, Krishna JVS, Prasanthkumar S, Giribabu L. Light induced oxidation of an indoline derived system triggered spherical aggregates. Phys Chem Chem Phys 2017; 19:26535-26539. [PMID: 28960002 DOI: 10.1039/c7cp04988a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Indoline based donor-acceptor system (InBT) exhibits a colour transition from pink to orange to yellow in chloroform facilitated by the photo-oxidation of the N,N-dimethyl indoline of InBT and neutralized by chloride counter ions upon light irradiation at short and long range excitation wavelengths of 320 and 500 nm, which leads to spherical aggregates when subjected to methanol vapour diffusion (MVD).
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Affiliation(s)
- Madoori Mrinalini
- Inorganic & Physical Chemistry Division CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad, 500007, Telangana, India.
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Santhosh Kumar K, Prasanthkumar S, Ray J. Biomass yield, oil productivity and fatty acid profile of Chlorella lobophora cultivated in diverse eutrophic wastewaters. Biocatalysis and Agricultural Biotechnology 2017. [DOI: 10.1016/j.bcab.2017.08.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mrinalini M, Krishna NV, Suman Krishna JV, Ramya AR, Prasanthkumar S, Giribabu L. H-bonding Assisted Self-Assembled One-Dimensional Nanotubes of Redox Active Triphenylamine-Benzothiadiazole Derivative. ChemistrySelect 2017. [DOI: 10.1002/slct.201700750] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Madoori Mrinalini
- Inorganic & Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology (IICT); Tarnaka Hyderabad- 500007, Telangana India
| | - Narra Vamsi Krishna
- Inorganic & Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology (IICT); Tarnaka Hyderabad- 500007, Telangana India
- Academy of Scientific and Innovation Research (AcSIR); New Delhi India
| | - Jonnadula Venkata Suman Krishna
- Inorganic & Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology (IICT); Tarnaka Hyderabad- 500007, Telangana India
- Academy of Scientific and Innovation Research (AcSIR); New Delhi India
| | - A. R. Ramya
- Inorganic & Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology (IICT); Tarnaka Hyderabad- 500007, Telangana India
| | - Seelam Prasanthkumar
- Inorganic & Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology (IICT); Tarnaka Hyderabad- 500007, Telangana India
| | - Lingamallu Giribabu
- Inorganic & Physical Chemistry Division; CSIR-Indian Institute of Chemical Technology (IICT); Tarnaka Hyderabad- 500007, Telangana India
- Academy of Scientific and Innovation Research (AcSIR); New Delhi India
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Rajeswari R, Mrinalini M, Prasanthkumar S, Giribabu L. Emerging of Inorganic Hole Transporting Materials For Perovskite Solar Cells. CHEM REC 2017; 17:681-699. [PMID: 28052541 DOI: 10.1002/tcr.201600117] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Indexed: 11/11/2022]
Abstract
Hole transporting material (HTM) is a significant component to achieve the high performance perovskite solar cells (PSCs). Over the years, inorganic, organic and hybrid (organic-inorganic) material based HTMs have been developed and investigated successfully. Today, perovskite solar cells achieved the efficiency of 22.1 % with with 2,2',7,7'-tetrakis(N,N-di-p-methoxyphenyl-amine) 9,9-spirobifluorene (spiro-OMeTAD) as HTM. Nevertheless, synthesis and cost of organic HTMs is a major challenging issue and therefore alternative materials are required. From the past few years, inorganic HTMs showed large improvement in power conversion efficiency (PCE) and stability. Recently CuOx reached the PCE of 19.0% with better stability. These developments affirms that inorganic HTMs are better alternativesto the organic HTMs for next generation PSCs. In this report, we mainly focussed on the recent advances of inorganic and hybrid HTMs for PSCs and highlighted the efficiency and stability of PSCs improved by changing metal oxides as HTMs. Consequently, we expect that energy levels of these inorganic HTMs matches very well with the valence band of perovskites and improved efficiency helps in future practical deployment of low cost PSCs.
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Affiliation(s)
- Ramireddy Rajeswari
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, 500007, Telangana, India
| | - Madoori Mrinalini
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, 500007, Telangana, India
| | - Seelam Prasanthkumar
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, 500007, Telangana, India
| | - Lingamallu Giribabu
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, 500007, Telangana, India.,Academy of Scientific and Innovative Research (AcSIR), New Delhi, India
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Achary BS, Gokulnath S, Ghosh S, Mrinalini M, Prasanthkumar S, Giribabu L. Unprecedented Charge-Transfer Complex of Fused Diporphyrin as Near-Infrared Absorption-Induced High-Aspect-Ratio Nanorods. Chem Asian J 2016; 11:3498-3502. [PMID: 27781413 DOI: 10.1002/asia.201601363] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Indexed: 12/22/2022]
Abstract
Charge-transfer (CT) complexes of near-infrared absorbing systems have been unknown until now. Consequently, structural similarities between donor and acceptor are rather important to achieve this phenomenon. Herein, we report electron donors such as non-fused diporphyrin-anthracene (DP), zinc diporphyrin-anthracene (ZnDP) and fused zinc diporphyrin-anthracene (FZnDP) in which FZnDP absorbs in NIR region and permits a CT complex with the electron acceptor, perylene diimide (PDI) in CHCl3 exclusively. UV/Vis-NIR absorption, 1 H NMR, NOESY and powder X-ray diffraction analysis demonstrated that the CT complex formation occurs by π-π stacking between perylene units in FZnDP and PDI upon mixing together in a 1:1 molar concentration in CHCl3 , unlike non-fused ZnDP and DP. TEM and AFM images revealed that the CT complex initially forms nanospheres leading to nanorods by diffusion of CH3 OH vapors into the CHCl3 solution of FZnDP/PDI (1:1 molar ratio). Therefore, these CT nanorods could lead to significant advances in optical, biological and ferroelectric applications.
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Affiliation(s)
- B Shivaprasad Achary
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India
| | - Sabapathi Gokulnath
- School of Chemistry, Indian Institute of Scientific and Educational Research (IISER), Trivandrum-695016, Kerala, India
| | - Samrat Ghosh
- Photoscience&Photonics Division, CSIR-National Institute of Interdisciplinary Science and Technology (NIIST), Trivandrum-695019, Kerala, India
| | - Madoori Mrinalini
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India
| | - Seelam Prasanthkumar
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India
| | - Lingamallu Giribabu
- Inorganic & Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology (IICT), Tarnaka, Hyderabad-500007, Telangana, India.,Academy of Scientific and Innovation Research (AcSIR), New Delhi, India
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Prasanthkumar S, Zhang W, Jin W, Fukushima T, Aida T. Selective Synthesis of Single- and Multi-Walled Supramolecular Nanotubes by Using Solvophobic/Solvophilic Controls: Stepwise Radial Growth via “Coil-on-Tube” Intermediates. Angew Chem Int Ed Engl 2015; 54:11168-72. [DOI: 10.1002/anie.201505806] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Indexed: 11/09/2022]
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Prasanthkumar S, Zhang W, Jin W, Fukushima T, Aida T. Selective Synthesis of Single- and Multi-Walled Supramolecular Nanotubes by Using Solvophobic/Solvophilic Controls: Stepwise Radial Growth via “Coil-on-Tube” Intermediates. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505806] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Prasanthkumar S, Ghosh S, Nair VC, Saeki A, Seki S, Ajayaghosh A. Organic Donor-Acceptor Assemblies form Coaxial p-n Heterojunctions with High Photoconductivity. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408831] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Prasanthkumar S, Ghosh S, Nair VC, Saeki A, Seki S, Ajayaghosh A. Organic Donor-Acceptor Assemblies form Coaxial p-n Heterojunctions with High Photoconductivity. Angew Chem Int Ed Engl 2014; 54:946-50. [DOI: 10.1002/anie.201408831] [Citation(s) in RCA: 123] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 10/24/2014] [Indexed: 01/19/2023]
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Abstract
Nature excels at engineering materials by using the principles of chemical synthesis and molecular self-assembly with the help of noncovalent forces. Learning from these phenomena, scientists have been able to create a variety of self-assembled artificial materials of different size, shapes, and properties for wide ranging applications. An area of great interest in this regard is solvent-assisted gel formation with functional organic molecules, thus leading to one-dimensional fibers. Such fibers have improved electronic properties and are potential soft materials for organic electronic devices, particularly in bulk heterojunction solar cells. Described herein is how molecular self-assembly, which was originally proposed as a simple laboratory curiosity, has helped the evolution of a variety of soft functional materials useful for advanced electronic devices such as organic field-effect transistors and organic solar cells. Highlights on some of the recent developments are discussed.
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Affiliation(s)
- Sukumaran Santhosh Babu
- Photosciences and Photonics Group, Chemical Sciences and Technologies Division, National Institute for Interdisciplinary Science and Technology (NIIST), CSIR, Trivandrum, India
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Reshmy R, Nirmal R, Prasanthkumar S, Thomas KK, Thomas M, Nair TM, Sulekha A. EFFECT OF BENZOTHIAZOLOYLTHIAZOLES AS SECONDARY ACCELERATORS IN THE SULFUR VULCANIZATION OF NATURAL RUBBER. Rubber Chemistry and Technology 2011. [DOI: 10.5254/1.3548734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
The vulcanization of natural rubber and a blend of natural rubber and reclaimed rubber by using binary accelerator systems containing a novel series of benzothiazoloylthiazole as secondary accelerator (SA) has been studied. These secondary accelerators were synthesized by a green chemical method under solvent-free conditions, by the irradiation of microwaves (180 W). The synergistic effect of the SA with N-Cyclohexyl-2-benzothiazolsulfenamide as primary accelerator was studied at 150 °C. These binary systems were effective in reducing the cure time and improving the rheometric and mechanical properties. These SAs were found to be effective in reducing the cure time with a minimal amount of 0.5 phr, but commercially available SAs such as thioureas and tetramethylthiuram disulfide were reported to show reduction in cure time only by increasing the amount of SA. Mechanical properties such as hardness, abrasion loss, tensile strength, percentage strain at break, and modulus at different elongations 100, 200, and 300% were evaluated and found to be immensely improved. The improved mechanical properties were also shown to be at par with crosslink densities (1/2Mc) of different mixes.
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Affiliation(s)
- R. Reshmy
- 1Post Graduate Department of Chemistry, Bishop Moore College, Mavelikara 690110, Kerala, India
| | - R. Nirmal
- 1Post Graduate Department of Chemistry, Bishop Moore College, Mavelikara 690110, Kerala, India
| | - S. Prasanthkumar
- 1Post Graduate Department of Chemistry, Bishop Moore College, Mavelikara 690110, Kerala, India
| | - K. Kurien Thomas
- 1Post Graduate Department of Chemistry, Bishop Moore College, Mavelikara 690110, Kerala, India
| | - Molice Thomas
- 2Post Graduate Department of Chemistry, Christian College, Chengannur 689122, Kerala, India
| | - T. Muraleedharan Nair
- 3Common Facility Service Centre, Department of Industries, Government of Kerala, Changanacherry, Kerala, India
| | - A. Sulekha
- 4Post Graduate Department of Chemistry, S.N. College, Kollam-691001
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Prasanthkumar S, Gopal A, Ajayaghosh A. Self-Assembly of Thienylenevinylene Molecular Wires to Semiconducting Gels with Doped Metallic Conductivity. J Am Chem Soc 2010; 132:13206-7. [DOI: 10.1021/ja1068195] [Citation(s) in RCA: 125] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Prasanthkumar S, Saeki A, Seki S, Ajayaghosh A. Solution Phase Epitaxial Self-Assembly and High Charge-Carrier Mobility Nanofibers of Semiconducting Molecular Gelators. J Am Chem Soc 2010; 132:8866-7. [DOI: 10.1021/ja103685j] [Citation(s) in RCA: 161] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Seelam Prasanthkumar
- Photosciences and Photonics Group, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology (NIIST), CSIR, Trivandrum 695019, India, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan, and PRESTO, Japan Science and Technology Agency (JST), Japan
| | - Akinori Saeki
- Photosciences and Photonics Group, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology (NIIST), CSIR, Trivandrum 695019, India, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan, and PRESTO, Japan Science and Technology Agency (JST), Japan
| | - Shu Seki
- Photosciences and Photonics Group, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology (NIIST), CSIR, Trivandrum 695019, India, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan, and PRESTO, Japan Science and Technology Agency (JST), Japan
| | - Ayyappanpillai Ajayaghosh
- Photosciences and Photonics Group, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology (NIIST), CSIR, Trivandrum 695019, India, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan, and PRESTO, Japan Science and Technology Agency (JST), Japan
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Babu S, Praveen V, Prasanthkumar S, Ajayaghosh A. Self-Assembly of Oligo(para-phenylenevinylene)s through Arene-Perfluoroarene Interactions: π Gels with Longitudinally Controlled Fiber Growth and Supramolecular Exciplex-Mediated Enhanced Emission. Chemistry 2008; 14:9577-84. [DOI: 10.1002/chem.200801255] [Citation(s) in RCA: 113] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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