1
|
Patra A, Shah A, Singh DP, Roy A, Kumar S. Novel Self-Assembling Supramolecular Phenanthro[9,10-a]phenazine Discotic Liquid Crystals: Synthesis, Characterization and Charge Transport Studies. Chem Asian J 2024:e202400542. [PMID: 38940412 DOI: 10.1002/asia.202400542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2024] [Revised: 06/27/2024] [Accepted: 06/28/2024] [Indexed: 06/29/2024]
Abstract
The incorporation of heteroatoms in the chemical structure of organic molecules has been identified as analogous to the doping process adopted in silicon semiconductors to influence the nature of charge carriers. This strategy has been an eye-opener for material chemists in synthesizing new materials for optoelectronic applications. Phenanthro[9,10-a]phenazine-based mesogens have been synthesized via a cyclo-condensation pathway involving triphenylene-based diketone and o-phenyl diamines. The incorporation of phenazine moiety as discussed in this paper, alters the symmetric nature of the triphenylene. The phenanthro[9,10-a]phenazine-based mesogens exhibit hole mobility in the order of 10-4 cm2/Vs as measured by the space-charge limited current (SCLC) technique. The current density in the SCLC device increases with increasing temperature which indicates that the charge transport is associated with the thermally activated hopping process. This report attempts to elucidate the self-organization of asymmetric phenanthro[9,10-a] phenazine in the supramolecular liquid crystalline state and their potential for the fabrication of high-temperature optoelectronic devices. However, the low charge carrier mobility can be one of the challenges for device performance.
Collapse
Affiliation(s)
- Alakananda Patra
- Soft Condensed Matter, Raman Research Institute, C. V. Raman Avenue, Bengaluru, 560080, India
| | - Asmita Shah
- Unité de Dynamique et Structure des Matériaux Moléculaires (UDSMM), Université du Littoral Côte d'Opale (ULCO), UR 4476, 62228, Calais cedex, France
| | - Dharmendra Pratap Singh
- Unité de Dynamique et Structure des Matériaux Moléculaires (UDSMM), Université du Littoral Côte d'Opale (ULCO), UR 4476, 62228, Calais cedex, France
| | - Arun Roy
- Soft Condensed Matter, Raman Research Institute, C. V. Raman Avenue, Bengaluru, 560080, India
| | - Sandeep Kumar
- Soft Condensed Matter, Raman Research Institute, C. V. Raman Avenue, Bengaluru, 560080, India
- Department of Chemistry, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore, 560064, India
| |
Collapse
|
2
|
Dorfner AL, Locoteta DP, Messinger CD, Ramsey MR, Kim NY, Sadzaglishvili E, Kranick JC, Kuehner JS, Timony CJ, Langton M, Winklarek JE, Tucker LJ, O'Donnell JL. Non-isothermal cold crystallization of liquid crystalline porphyrins. SOFT MATTER 2023; 19:6414-6422. [PMID: 37581239 DOI: 10.1039/d3sm00760j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
A series of liquid crystalline porphyrins was synthesized, purified, and characterized. Differential scanning calorimetry (DSC) and hot-stage polarized optical microscopy (HS-POM) revealed that the porphyrins in the series with shorter alkyl arm lengths exhibit kinetic cold crystallization, wherein the molecules spontaneously organize into large, disc-like structures that remain stable upon cooling. Using DSC, the kinetic and thermodynamic parameters related to these materials were determined. Analysis of non-isothermal crystallization revealed the presence of multiple nucleation and growth processes related to cold crystallization.
Collapse
Affiliation(s)
- Alec L Dorfner
- Siena College, Department of Chemistry and Biochemistry, 515 Loudon Road, Loudonville, NY, 12211, USA.
| | - Diana P Locoteta
- Siena College, Department of Chemistry and Biochemistry, 515 Loudon Road, Loudonville, NY, 12211, USA.
| | - Caleb D Messinger
- Siena College, Department of Chemistry and Biochemistry, 515 Loudon Road, Loudonville, NY, 12211, USA.
| | - Michael R Ramsey
- Siena College, Department of Chemistry and Biochemistry, 515 Loudon Road, Loudonville, NY, 12211, USA.
| | - Nathaniel Y Kim
- Siena College, Department of Chemistry and Biochemistry, 515 Loudon Road, Loudonville, NY, 12211, USA.
| | - Elene Sadzaglishvili
- Siena College, Department of Chemistry and Biochemistry, 515 Loudon Road, Loudonville, NY, 12211, USA.
| | - Joshua C Kranick
- Siena College, Department of Chemistry and Biochemistry, 515 Loudon Road, Loudonville, NY, 12211, USA.
| | - Joseph S Kuehner
- Siena College, Department of Chemistry and Biochemistry, 515 Loudon Road, Loudonville, NY, 12211, USA.
| | - Collin J Timony
- Siena College, Department of Chemistry and Biochemistry, 515 Loudon Road, Loudonville, NY, 12211, USA.
| | - Michelle Langton
- Siena College, Department of Chemistry and Biochemistry, 515 Loudon Road, Loudonville, NY, 12211, USA.
| | - Jeffrey E Winklarek
- Siena College, Department of Chemistry and Biochemistry, 515 Loudon Road, Loudonville, NY, 12211, USA.
| | - Lucas J Tucker
- Siena College, Department of Chemistry and Biochemistry, 515 Loudon Road, Loudonville, NY, 12211, USA.
| | - Jodi L O'Donnell
- Siena College, Department of Chemistry and Biochemistry, 515 Loudon Road, Loudonville, NY, 12211, USA.
| |
Collapse
|
3
|
Spruner von Mertz F, Molenda R, Boldt S, Villinger A, Ehlers P, Langer P. Synthesis and Properties of Diphenylbenzo[j]naphtho[2,1,8-def][2,7]phenanthrolines. Chemistry 2023; 29:e202204011. [PMID: 36795006 DOI: 10.1002/chem.202204011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Indexed: 02/17/2023]
Abstract
A series of hitherto unknown 5,14-diphenylbenzo[j]naphtho[2,1,8-def][2,7]phenanthrolines, containing a 5-azatetracene and a 2-azapyrene subunit, were prepared by combination of Pd-catalyzed cross-coupling reactions with a one-pot Povarov/cycloisomerization reaction. In the final key step four new bonds are formed in one step. The synthetic approach allows for a high degree of diversification of the heterocyclic core structure. The optical and electrochemical properties were studied experimentally and by DFT/TD-DFT and NICS calculations. Due to the presence of the 2-azapyrene subunit, the typical electronic nature and characteristics of the 5-azatetracene moiety are lost and the compounds are electronically and optically more related to 2-azapyrenes.
Collapse
Affiliation(s)
| | - Ricardo Molenda
- Institut für Chemie, Universität Rostock, A.-Einstein-Str. 3a, 18059, Rostock, Germany
| | - Sebastian Boldt
- Institut für Chemie, Universität Rostock, A.-Einstein-Str. 3a, 18059, Rostock, Germany
| | - Alexander Villinger
- Institut für Chemie, Universität Rostock, A.-Einstein-Str. 3a, 18059, Rostock, Germany
| | - Peter Ehlers
- Institut für Chemie, Universität Rostock, A.-Einstein-Str. 3a, 18059, Rostock, Germany
| | - Peter Langer
- Institut für Chemie, Universität Rostock, A.-Einstein-Str. 3a, 18059, Rostock, Germany
- Leibniz Institut für Katalyse, Universität Rostock, A.-Einstein-Str. 29a, 18059, Rostock, Germany
| |
Collapse
|
4
|
Sharma V, Vishwakarma VK, Shrivastav PS, Ammathnadu Sudhakar A, Sharma AS, Shah PA. Calixarene Functionalized Supramolecular Liquid Crystals and Their Diverse Applications. ACS OMEGA 2022; 7:45752-45796. [PMID: 36570265 PMCID: PMC9774433 DOI: 10.1021/acsomega.2c04699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 11/15/2022] [Indexed: 06/17/2023]
Abstract
Liquid crystals are considered to be the fourth state of matter with an intermediate order and fluidity in comparison to solids and liquids. Calixarenes are among one of the most versatile families of building blocks for supramolecular chemistry due to their unique vaselike structure that can be chemically engineered to have different shapes and sizes. During the last few decades, calixarenes have drawn much attention in the field of supramolecular chemistry due to their diverse applications in the fields of ion and molecular recognition, ion-selective electrodes for catalysis, drug delivery, gelation, organic electronics and sensors, etc. Imbuing liquid crystallinity to the calixarene framework leads to functionalized calixarene derivatives with fluidity and order. Columnar self-assembly of such derivatives in particular enhance the charge migration along the column due to the 1D stacking due to the enhanced π-π overlap. Considering limited reports and reviews on this new class of calixarene based liquid crystals, a comprehensive account of the synthesis of calixarene liquid crystals along with their mesomorphic behavior and potential applications are presented in this review.
Collapse
Affiliation(s)
- Vinay
S. Sharma
- Department
of Chemistry, School of Science, Gujarat
University, Navrangpura, Ahmedabad 380009, Gujarat India
| | | | - Pranav S. Shrivastav
- Department
of Chemistry, School of Science, Gujarat
University, Navrangpura, Ahmedabad 380009, Gujarat India
| | - Achalkumar Ammathnadu Sudhakar
- Department
of Chemistry, Indian Institute of Technology, Guwahati 781039, Assam India
- Centre
for Sustainable Polymers, Indian Institute
of Technology, Guwahati 781039, Assam India
| | - Anuj S. Sharma
- Department
of Chemistry, School of Science, Gujarat
University, Navrangpura, Ahmedabad 380009, Gujarat India
| | - Priyanka A. Shah
- Department
of Chemistry, School of Science, Gujarat
University, Navrangpura, Ahmedabad 380009, Gujarat India
| |
Collapse
|
5
|
Vanishree Bhat S, Swamynathan K, Kumar S. Synthesis and mesomorphic characterization of novel liquid crystals derived from bioactive natural sterols. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
6
|
Tober N, Winter J, Jochem M, Lehmann M, Detert H. Tris(5‐aryl‐1,3,4‐oxadiazolyl)benzotrithiophenes – Discotic Liquid Crystals with Enormous Mesophase Ranges. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001475] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Natalie Tober
- Department of Chemistry University of Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Johannes Winter
- Department of Chemistry University of Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Matthias Jochem
- Department of Chemistry University of Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Matthias Lehmann
- Institute of Organic Chemistry University of Würzburg Am Hubland 97074 Würzburg Germany
| | - Heiner Detert
- Department of Chemistry University of Mainz Duesbergweg 10–14 55128 Mainz Germany
| |
Collapse
|
7
|
Chen X, Guo F, Wei T, Tian H, Qi H. Metal-Free sp3 C-H Bond Oxidation and Functionalization of α-Bromoketones to Quinoxalinone, Benzoxazinone, and Benzothiazinone Heterocyclic Compounds. HETEROCYCLES 2021. [DOI: 10.3987/com-21-14460] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
8
|
Patra A, Swamynathan K, Kumar S. Synthesis of novel regioisomeric phenanthro[a]phenazine derivatives through the SNAr strategy and their self-assembly into columnar phases. NEW J CHEM 2021. [DOI: 10.1039/d0nj05042c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis and characterization of novel discotic liquid crystalline regioisomers for optoelectronic applications.
Collapse
Affiliation(s)
- Alakananda Patra
- Raman Research Institute
- Soft Condensed Matter
- Bangalore 560080
- India
| | - K. Swamynathan
- Raman Research Institute
- Soft Condensed Matter
- Bangalore 560080
- India
- Department of Chemistry
| | - Sandeep Kumar
- Raman Research Institute
- Soft Condensed Matter
- Bangalore 560080
- India
- Department of Chemistry
| |
Collapse
|
9
|
|
10
|
Chen YR, Zhang YY, Yeh MC, Luo YT, Ong CW. Long-Range Self-Assembly of an Electron-Deficient Hexaazatrinaphthylene with Out-of-Plane Substituents. Chempluschem 2020; 85:613-618. [PMID: 32237232 DOI: 10.1002/cplu.201900593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 11/26/2019] [Indexed: 11/08/2022]
Abstract
The unprecedented time-dependent long-range supramol-ecular assembly of electron-deficient hexaazatrinaphthylene (HATN) core based on peripheral crowding with three out-of-plane cyclic ketals is reported. The single-crystal X-ray structure of the diethyl derivative provided detailed information as to how four molecules in a repeating unit were packed in order to avoid steric crowding of the out-of-plane cyclic ketal side chain, providing locking and fastening for stabilizing the self-assembled structure. The polarizing optical microscopy (POM) and differential scanning calorimetry (DSC) did not instantaneously show any phase transition upon the cooling process. To our surprise, POM images showed a nucleation of spherulite up to 100 μm after 24 hour later. X-ray diffraction data further confirmed that these soft crystal formed a hexagonal-like crystal. The long-range self-assembly of the new material showed a slight red shift in the UV-vis absorption spectra and further substantiated by computational method.
Collapse
Affiliation(s)
- Yi-Ru Chen
- Department of Chemistry, National Sun Yat-sen University, 70 Lienhai Rd., Kaohsiung, 80424, Taiwan
| | - Yong-Yun Zhang
- Department of Chemistry, National Sun Yat-sen University, 70 Lienhai Rd., Kaohsiung, 80424, Taiwan
| | - Ming-Che Yeh
- Department of Chemistry, National Sun Yat-sen University, 70 Lienhai Rd., Kaohsiung, 80424, Taiwan
| | - Ying-Ting Luo
- Department of Chemistry, National Sun Yat-sen University, 70 Lienhai Rd., Kaohsiung, 80424, Taiwan
| | - Chi Wi Ong
- Department of Chemistry, National Sun Yat-sen University, 70 Lienhai Rd., Kaohsiung, 80424, Taiwan
| |
Collapse
|
11
|
Rodrigues LD, Sunil D, Chaithra D, Bhagavath P. 1,2,3/1,2,4-Triazole containing liquid crystalline materials: An up-to-date review of their synthetic design and mesomorphic behavior. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.111909] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
12
|
Tober N, Rieth T, Lehmann M, Detert H. Synthesis, Thermal, and Optical Properties of Tris(5-aryl-1,3,4-oxadiazol-2-yl)-1,3,5-triazines, New Star-Shaped Fluorescent Discotic Liquid Crystals. Chemistry 2019; 25:15295-15304. [PMID: 31424134 PMCID: PMC6916359 DOI: 10.1002/chem.201902975] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Indexed: 01/01/2023]
Abstract
The synthesis of tris(aryloxadiazolyl)triazines (TOTs), C3‐symmetrical star‐shaped mesogenes with a 1,3,5‐triazine center, 5‐phenyl‐1,3,4‐oxadiazole arms, and various peripheral alkoxy side chains is reported. Threefold Huisgen reaction on a central triazine tricarboxylic acid and suitable aryltetrazoles yields the title compounds. Selected analogues with a benzene center are included in this study and allow for an evaluation of the impact of the central unit on the physical properties. Thermal (differential scanning calorimetry, DSC; polarization optical microscopy, POM), optical (UV/Vis, fluorescence), electric (time of flight, TOF), and structural (single crystal; wide‐angle X‐ray scattering, WAXS) properties of these compounds were investigated. The modification of alkoxy chain length and substitution pattern allows for a tuning of the physical properties. TOTs emit blue to yellow light, depending on conjugation length, donor–acceptor substitution, and solvent polarity, whereas concentration quenches and aggregation enhances the emission. The width of the mesophases is typically around ΔT=100–150 K but can even exceed 220 K. Polarization optical microscopy and X‐ray diffraction on oriented filaments reveal that TOTs are highly ordered liquid crystals (LCs) with long‐range hexagonal columnar structure.
Collapse
Affiliation(s)
- Natalie Tober
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Thorsten Rieth
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Matthias Lehmann
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Heiner Detert
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| |
Collapse
|
13
|
Sharma VS, Sharma AS, Shah AP, Shah PA, Shrivastav PS, Athar M. New Class of Supramolecular Bowl-Shaped Columnar Mesogens Derived from Thiacalix[4]arene Exhibiting Gelation and Organic Light-Emitting Diodes Applications. ACS OMEGA 2019; 4:15862-15872. [PMID: 31592456 PMCID: PMC6776968 DOI: 10.1021/acsomega.9b01776] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Accepted: 09/09/2019] [Indexed: 06/10/2023]
Abstract
A new class of blue light-emitting bowl-shaped mesogens with the thiacalix[4]arene core appended with 1,3,4-thiadiazole derivatives having peripheral alkoxy side chains have been synthesized and well characterized. The liquid crystalline behavior of present synthesized derivatives was examined by optical polarizing microscopy, differential scanning calorimetry, and X-ray diffraction studies. It was observed that these thiacalix[4]arene derivatives were capable of stabilizing the observed Colh phase with a higher temperature range. The cone-shaped thiacalix[4]arene-based liquid crystals with peripheral alkoxy side chains able to pack into the columns with enriched intermolecular interactions and thermal behavior. All derivatives showed blue luminescence in solution, solid thin-film, and gelation state. The hexagonal columnar phase and emissive nature of thiadiazole-based thiacalixarene compounds having xerogel behavior make them favorable in the application of emissive electronic display devices. The electrochemical properties of these thiacalixarene-based compounds demonstrate the effect of alkyl side chain on the highest occupied molecular orbital-lowest unoccupied molecular orbital energy levels and also exhibited lower electron band gaps. The electroluminescence behavior of the compound 10c was examined as emissive layers in the fabrication of organic light-emitting diodes.
Collapse
Affiliation(s)
- Vinay S. Sharma
- Department
of Chemistry, Faculty of Basic and Applied Sciences, Madhav University, Abu
Road, Sirohi 307026, Rajasthan, India
| | - Anuj S. Sharma
- Department
of Chemistry, School of Science, Gujarat
University, Ahmedabad 380009, Gujarat, India
| | - Akshara P. Shah
- Department
of Chemistry, Mumbai University, Santacruz, Mumbai 400
098, India
| | - Priyanka A. Shah
- Department
of Chemistry, School of Science, Gujarat
University, Ahmedabad 380009, Gujarat, India
| | - Pranav S. Shrivastav
- Department
of Chemistry, School of Science, Gujarat
University, Ahmedabad 380009, Gujarat, India
| | - Mohd Athar
- Department
of Chemistry, Central University of Gujarat, Ghandhinagar 382030, India
| |
Collapse
|
14
|
Sharma VS, Shah AP, Sharma AS. A new class of supramolecular liquid crystals derived from azo calix[4]arene functionalized 1,3,4-thiadiazole derivatives. NEW J CHEM 2019. [DOI: 10.1039/c8nj04997a] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new class of bowl-shaped supramolecular liquid crystals (LCs) is described derived from calix[4]arene substituted with 1,3,4-thiadiazole derivatives, inbuilt with Schiff base and ester on the lower rim and with an azo group on the upper rim with an alkyl side chain (–OC3H7, –OC8H17).
Collapse
Affiliation(s)
- Vinay S. Sharma
- Department of Chemistry
- Faculty of Basic and Applied Science
- Madhav University
- Sirohi
- India
| | | | - Anuj S. Sharma
- Department of Chemistry
- School of Science
- Gujarat University
- Ahmedabad
- India
| |
Collapse
|
15
|
Sharma VS, Shah AP, Sharma AS, Athar M. Columnar self-assembly, gelation and electrochemical behavior of cone-shaped luminescent supramolecular calix[4]arene LCs based on oxadiazole and thiadiazole derivatives. NEW J CHEM 2019. [DOI: 10.1039/c8nj04922j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A new class of blue light-emitting supramolecular liquid crystalline cone or bowl-shaped compounds were synthesized from substituted 1,3,4-oxadiazoles and 1,3,4-thiadiazoles with calix[4]arene derivatives.
Collapse
Affiliation(s)
- Vinay S. Sharma
- Department of Chemistry
- Faculty of Basic and Applied Science
- Madhav University
- Sirohi
- India
| | | | - Anuj S. Sharma
- Department of Chemistry
- School of Science
- Gujarat University
- Ahmedabad
- India
| | - Mohd Athar
- CCG@CUG
- School of Chemical Sciences
- Central University of Gujarat
- Ghandhinagar
- India
| |
Collapse
|
16
|
Karam NH, Sultan MT, Badri DH, Al-Dujaili AH. Mesogenic materials incorporating 4H-1,2,4-triazol-3-thiol moiety: Synthesis, characterization and liquid crystals study. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.06.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
17
|
Abstract
Abstract
Over several years, our research team has contributed to ligand design for metal-catalyzed stereoselective transformations. This has been achieved with the synthesis and application to organic transformations of interest of an array of structurally diverse P-containing ligands. These range from highly modular enantiopure phosphine–phosphite ligands to supramolecularly regulated enantioselective phosphorus-based catalysts. Our research in supramolecular interactions has also led to the discovery of an unprecedented halogen-bonded rhodium-catalyst.
Collapse
|
18
|
Bala I, Ming L, Yadav RAK, De J, Dubey DK, Kumar S, Singh H, Jou J, Kailasam K, Pal SK. Deep‐Blue OLED Fabrication from Heptazine Columnar Liquid Crystal Based AIE‐Active Sky‐Blue Emitter. ChemistrySelect 2018. [DOI: 10.1002/slct.201801715] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Indu Bala
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER), Mohali, Sector-81 Knowledge city Manauli 140306 India
| | - Lee Ming
- Department of Materials Science and EngineeringNational Tsing Hua University Hsinchu 30013 Taiwan
| | - Rohit Ashok Kumar Yadav
- Department of Materials Science and EngineeringNational Tsing Hua University Hsinchu 30013 Taiwan
| | - Joydip De
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER), Mohali, Sector-81 Knowledge city Manauli 140306 India
| | - Deepak Kumar Dubey
- Department of Materials Science and EngineeringNational Tsing Hua University Hsinchu 30013 Taiwan
| | - Sunil Kumar
- Institute of Nano Science and Technology (INST), Sector-64, Phase 10 Mohali 160062 India
| | - Harpreet Singh
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER), Mohali, Sector-81 Knowledge city Manauli 140306 India
| | - Jwo‐Huei Jou
- Department of Materials Science and EngineeringNational Tsing Hua University Hsinchu 30013 Taiwan
| | - Kamalakannan Kailasam
- Institute of Nano Science and Technology (INST), Sector-64, Phase 10 Mohali 160062 India
| | - Santanu Kumar Pal
- Department of Chemical SciencesIndian Institute of Science Education and Research (IISER), Mohali, Sector-81 Knowledge city Manauli 140306 India
| |
Collapse
|
19
|
Cheng H, Gao H, Wang T, Xia M, Cheng X. Polycatenar bent-shaped liquid crystals with columnar and cubic phases: Synthesis multi-responsive organogels and chemosensors. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.11.041] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
20
|
Pradhan B, Gupta RK, Pathak SK, De J, Pal SK, Achalkumar AS. Columnar self-assembly of luminescent bent-shaped hexacatenars with a central pyridine core connected with substituted 1,3,4-oxadiazole and thiadiazoles. NEW J CHEM 2018. [DOI: 10.1039/c7nj04449f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Multifunctional pyridine based bent shaped polycatenars stabilizing liquid crystalline and organogel self-assembly.
Collapse
Affiliation(s)
- Balaram Pradhan
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | | | - Suraj Kumar Pathak
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Joydip De
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Mohali
- Manauli 140306
- India
| | - Santanu Kumar Pal
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Mohali
- Manauli 140306
- India
| | | |
Collapse
|
21
|
Vinayakumara DR, Swamynathan K, Kumar S, Adhikari AV. Optoelectronic exploration of novel non-symmetrical star-shaped discotic liquid crystals based on cyanopyridine. NEW J CHEM 2018. [DOI: 10.1039/c8nj02582g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel unsymmetrical star-shaped cyanopyridines were shown to possess an ordered hexagonal columnar assembly at room temperature. Their inherent intramolecular charge transport properties cause a technologically important intense blue light emission in the aggregated state.
Collapse
Affiliation(s)
- D. R. Vinayakumara
- Organic Materials Laboratory
- Department of Chemistry
- National Institute of Technology Karnataka
- Surathkal
- India
| | - K. Swamynathan
- SCM Group
- Raman Research Institute
- Bangalore – 560 080
- India
| | - Sandeep Kumar
- SCM Group
- Raman Research Institute
- Bangalore – 560 080
- India
| | - Airody Vasudeva Adhikari
- Organic Materials Laboratory
- Department of Chemistry
- National Institute of Technology Karnataka
- Surathkal
- India
| |
Collapse
|
22
|
Kato SI, Jin S, Kimura T, Yoshikawa N, Nara D, Imamura K, Shiota Y, Yoshizawa K, Katoono R, Yamanobe T, Uehara H, Nakamura Y. Trithiazolyl-1,3,5-triazines bearing decyloxybenzene moieties: synthesis, photophysical and electrochemical properties, and self-assembly behavior. Org Biomol Chem 2018; 16:3584-3595. [DOI: 10.1039/c8ob00471d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We synthesized the first members of trithiazolyl-1,3,5-triazines that combine attractive photophysical and self-assembling properties.
Collapse
|
23
|
Zhang K, Bai Y, Feng C, Ning G, Ni H, Yu W, Zhao K, Wang B, Hu P. Synthesis and characterization of new H-shaped triphenylene discotic room-temperature liquid crystal tetramers by a copper-free click reaction. NEW J CHEM 2018. [DOI: 10.1039/c7nj02695a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of new H-shaped triphenylene discotic liquid crystal tetramers has been designed and synthesized using a copper-free [3+2] cycloaddition reaction.
Collapse
Affiliation(s)
- Kan Zhang
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Yuefeng Bai
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Chun Feng
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Guanghui Ning
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Hailiang Ni
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Wenhao Yu
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Keqing Zhao
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Biqin Wang
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| | - Ping Hu
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu
- P. R. China
| |
Collapse
|
24
|
Xiao Y, Gao H, Wang T, Zhang R, Cheng X. Synthesis, liquid-crystalline, photophysical and chemosensor properties of oxadiazole/thiadiazole-based amphiphiles with glycerol groups. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.08.110] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
25
|
Dubey R, Yerrasani R, Karunakar M, Singh AK, Gupta R, Ganesan V, Rao T. Benzimidazole based mesogenic Schiff-bases: Synthesis and characterization. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.05.061] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
26
|
Korkut SE, Ocak H, Bilgin-Eran B, Güzeller D, Şener MK. Lyotropic liquid crystalline phthalocyanines containing 4-((S)-3,7-dimethyloctyloxy)phenoxy moieties. J PORPHYR PHTHALOCYA 2017. [DOI: 10.1142/s1088424616501261] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The novel metal free phthalocyanine and its copper complex which are octa-substituted at the peripheral positions with 4-(([Formula: see text]-3,7-dimethlyoctyloxy)phenoxy moieties were synthesized and characterized by FT-IR, 1H NMR and mass spectroscopy. Their mesomorphic properties were studied by polarizing optical microscopy. The spectroscopic properties and aggregation behaviors of the novel phthalocyanines were also investigated by UV-vis spectroscopy in different solvents with same concentration as well as in a wide range of concentrations of chloroform. Both compounds with chloroform and [Formula: see text]-dodecane clearly show the lyotropic columnar mesophase in a wide temperature range whereas thermotropic liquid crystalline behavior for both compounds is not observed. Both of these novel compounds show no aggregation in toluene, tetrahydrofuran, dichloromethane and chloroform.
Collapse
Affiliation(s)
- Sibel Eken Korkut
- Department of Chemistry, Yildiz Technical University, Davutpaşa Campus, Esenler, Istanbul TR-34220, Turkey
| | - Hale Ocak
- Department of Chemistry, Yildiz Technical University, Davutpaşa Campus, Esenler, Istanbul TR-34220, Turkey
| | - Belkıs Bilgin-Eran
- Department of Chemistry, Yildiz Technical University, Davutpaşa Campus, Esenler, Istanbul TR-34220, Turkey
| | - Dilek Güzeller
- Department of Chemistry, Yildiz Technical University, Davutpaşa Campus, Esenler, Istanbul TR-34220, Turkey
| | - M. Kasım Şener
- Department of Chemistry, Yildiz Technical University, Davutpaşa Campus, Esenler, Istanbul TR-34220, Turkey
| |
Collapse
|
27
|
Zhang X, Xia Y, Zhou L, Liu P, Deng W. Synthesis and application in photovoltaic device of the porphyrin derivatives with liquid crystal properties. Tetrahedron 2017. [DOI: 10.1016/j.tet.2016.12.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
28
|
Pathak SK, Nath S, De J, Pal SK, Achalkumar AS. Contrasting effects of heterocycle substitution and branched tails in the arms of star-shaped molecules. NEW J CHEM 2017. [DOI: 10.1039/c7nj00911a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Herein, heterocycle based star-shaped liquid crystalline tris(N-salicylideneaniline)s (TSANs) are reported.
Collapse
Affiliation(s)
- Suraj Kumar Pathak
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Subrata Nath
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Joydip De
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Mohali
- Manauli 140306
- India
| | - Santanu Kumar Pal
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Mohali
- Manauli 140306
- India
| | | |
Collapse
|
29
|
Peng X, Gao H, Xiao Y, Cheng H, Huang F, Cheng X. Synthesis and self-assembly of photoresponsive and luminescent polycatenar liquid crystals incorporating an azobenzene unit interconnecting two 1,3,4-thiadiazoles. NEW J CHEM 2017. [DOI: 10.1039/c6nj02604d] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Target compounds can self-assemble into a thermotropic LC phase sequence of SmC–Colhex–CubI and have binding selectivity to Cu2+.
Collapse
Affiliation(s)
- Xiongwei Peng
- Key Laboratory of Medicinal Chemistry for Natural Resources
- Chemistry Department
- Yunnan University
- Kunming
- P. R. China
| | - Hongfei Gao
- Key Laboratory of Medicinal Chemistry for Natural Resources
- Chemistry Department
- Yunnan University
- Kunming
- P. R. China
| | - Yulong Xiao
- Key Laboratory of Medicinal Chemistry for Natural Resources
- Chemistry Department
- Yunnan University
- Kunming
- P. R. China
| | - Huifang Cheng
- Key Laboratory of Medicinal Chemistry for Natural Resources
- Chemistry Department
- Yunnan University
- Kunming
- P. R. China
| | - Fanran Huang
- Key Laboratory of Medicinal Chemistry for Natural Resources
- Chemistry Department
- Yunnan University
- Kunming
- P. R. China
| | - Xiaohong Cheng
- Key Laboratory of Medicinal Chemistry for Natural Resources
- Chemistry Department
- Yunnan University
- Kunming
- P. R. China
| |
Collapse
|
30
|
Pradhan B, Chakraborty N, Gupta RK, Shanker G, Achalkumar AS. Nonsymmetrical cholesterol dimers constituting regioisomeric oxadiazole and thiadiazole cores: an investigation of the structure–property correlation. NEW J CHEM 2017. [DOI: 10.1039/c6nj03141b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of a bent angle on the stabilization of liquid crystalline and organogel self-assemblies.
Collapse
Affiliation(s)
- Balaram Pradhan
- Department of Chemistry
- Indian Institute of Technology Guwahati
- India
| | | | | | - G. Shanker
- Department of Studies in Chemistry
- Bangalore University
- Bangalore
- India
| | | |
Collapse
|
31
|
Pathak SK, Nath S, De J, Pal SK, Achalkumar AS. The effect of regioisomerism on the mesomorphic and photophysical behavior of oxadiazole-based tris(N-salicylideneaniline)s: synthesis and characterization. NEW J CHEM 2017. [DOI: 10.1039/c7nj01766a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new regioisomeric star-shaped tris(N-salicylideneaniline)s are synthesized and characterized.
Collapse
Affiliation(s)
- Suraj Kumar Pathak
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Subrata Nath
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati
- India
| | - Joydip De
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Mohali
- Manauli 140306
- India
| | - Santanu Kumar Pal
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Mohali
- Manauli 140306
- India
| | | |
Collapse
|
32
|
Jian J, Hong F, Xia Z, Zhu D, Wu H, Liu J, Bu X, Cui M, Zeng Z, Wang H. New fluorescent N-heterocyclic liquid crystals with high birefringence. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.10.071] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
33
|
Effect of Atomic-Scale Differences on the Self-Assembly of Thiophene-based Polycatenars in Liquid Crystalline and Organogel States. Chemistry 2016; 22:17843-17856. [DOI: 10.1002/chem.201603678] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 09/02/2016] [Indexed: 11/07/2022]
|
34
|
Pathak SK, Gupta M, Pal SK, Achalkumar AS. Hexacatenars Exhibiting π-π Driven Supergelation, Aggregation Induced Blue Light Emission and Thermochromism. ChemistrySelect 2016. [DOI: 10.1002/slct.201600927] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Suraj K. Pathak
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati 781039, Assam India
| | - Monika Gupta
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali, Sector-81, Knowledge City; Manauli 140306, Punjab India
| | - Santanu K. Pal
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali, Sector-81, Knowledge City; Manauli 140306, Punjab India
| | | |
Collapse
|
35
|
Novel bent-core mesogenic of 4-amino-triazole derivatives: synthesis, characterization and liquid crystalline study. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.06.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
36
|
Veerabhadraswamy BN, Dambal HK, Rao DSS, Yelamaggad CV. s-Triazine-Based Functional Discotic Liquid Crystals: Synthesis, Mesomorphism and Photoluminescence. Chemphyschem 2016; 17:2225-37. [DOI: 10.1002/cphc.201600280] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Indexed: 01/12/2023]
Affiliation(s)
| | - Hashambi K. Dambal
- Centre for Nano and Soft Matter Sciences; Jalahalli Bangalore 560 013 India
| | - D. S. Shankar Rao
- Centre for Nano and Soft Matter Sciences; Jalahalli Bangalore 560 013 India
| | - C. V. Yelamaggad
- Centre for Nano and Soft Matter Sciences; Jalahalli Bangalore 560 013 India
| |
Collapse
|
37
|
Hong F, Xia Z, Zhu D, Wu H, Liu J, Zeng Z. N-terminal strategy (N1–N4) toward high performance liquid crystal materials. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
38
|
Kirres J, Knecht F, Seubert P, Baro A, Laschat S. δ-Methyl Branching in the Side Chain Makes the Difference: Access to Room-Temperature Discotics. Chemphyschem 2016; 17:1159-65. [DOI: 10.1002/cphc.201501166] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Indexed: 01/13/2023]
Affiliation(s)
- Jochen Kirres
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Friederike Knecht
- Institut für Physikalische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Philipp Seubert
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Angelika Baro
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Sabine Laschat
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| |
Collapse
|
39
|
Funahashi M, Seki A. Nanostrucure Formation Based on the Functionalized Side Chains in Liquid-Crystalline Heteroaromatic Compounds. HETEROCYCLES 2016. [DOI: 10.3987/rev-15-827] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
40
|
Bai YF, Chen LQ, Xiang SK, Zhang K, Li QG, Feng C, Hu P, Wang BQ, Zhao KQ. Synthesis, structure and properties of polysubstituted benzo[g]chrysene by FeCl 3-promoted from diphenylacetypene and phenylacetaldehyde derivatives. RSC Adv 2016. [DOI: 10.1039/c6ra17701h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Benzo[g]chrysene (BgCh) is a new untapped virgin land in PAHs. A new and straightforward method has been developed to synthesize it. Part of BgCh revealed liquid crystalline properties and their fluorescence emission wavelength is in the range of blue light.
Collapse
Affiliation(s)
- Yue-Feng Bai
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610066
- P. R. China
| | - Li-Qin Chen
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610066
- P. R. China
| | - Shi-Kai Xiang
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610066
- P. R. China
| | - Kan Zhang
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610066
- P. R. China
| | - Qiang-Gen Li
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610066
- P. R. China
| | - Chun Feng
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610066
- P. R. China
| | - Ping Hu
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610066
- P. R. China
| | - Bi-Qin Wang
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610066
- P. R. China
| | - Ke-Qing Zhao
- College of Chemistry and Materials Science
- Sichuan Normal University
- Chengdu 610066
- P. R. China
| |
Collapse
|
41
|
Wöhrle T, Wurzbach I, Kirres J, Kostidou A, Kapernaum N, Litterscheidt J, Haenle JC, Staffeld P, Baro A, Giesselmann F, Laschat S. Discotic Liquid Crystals. Chem Rev 2015; 116:1139-241. [PMID: 26483267 DOI: 10.1021/acs.chemrev.5b00190] [Citation(s) in RCA: 422] [Impact Index Per Article: 46.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tobias Wöhrle
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Iris Wurzbach
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Jochen Kirres
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Antonia Kostidou
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Nadia Kapernaum
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Juri Litterscheidt
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Johannes Christian Haenle
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Peter Staffeld
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Angelika Baro
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Frank Giesselmann
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Sabine Laschat
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| |
Collapse
|
42
|
Vektariene A. Theoretical study on the mechanism of thieno[3,2-b
]benzofuranbromination: the importance of Lewis and non-Lewis type NBOs interactions along the reaction path. J PHYS ORG CHEM 2015. [DOI: 10.1002/poc.3483] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Ausra Vektariene
- Institute of Theoretical Physics and Astronomy; Vilnius University; A. Gostauto 12 LT-01108 Vilnius Lithuania
| |
Collapse
|
43
|
Synthesis and mesophases of C3h-symmetric 2,4,6-tris(2-hydroxyphenyl)-1,3,5-triazine derivatives with intramolecular hydrogen bonding networks. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.07.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
44
|
Eccher J, Zajaczkowski W, Faria GC, Bock H, von Seggern H, Pisula W, Bechtold IH. Thermal Evaporation versus Spin-Coating: Electrical Performance in Columnar Liquid Crystal OLEDs. ACS APPLIED MATERIALS & INTERFACES 2015; 7:16374-16381. [PMID: 26168313 DOI: 10.1021/acsami.5b03496] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The electrical responses of a columnar liquid crystal (a diimidodiester derivative of benzo[ghi]perylene) deposited either by spin-coating or by thermal evaporation into a typical OLED device are compared. For the spin-coated film, homeotropic alignment was induced by thermal annealing, which enhanced the charge carrier mobility significantly. For the evaporated films, homeotropic alignment could not be obtained by annealing. However, a degree of rectification higher than 3 orders of magnitude was achieved, even without annealing, with an electrical response similar to the response of the aligned spin-coated film. A trap-limited space-charge-limited current model was used to extract the charge carrier mobility directly from the current-voltage curves. Grazing incidence wide-angle X-ray scattering confirmed the homeotropic alignment of the annealed spin-coated film, whereas the columns are mostly oriented parallel to the surface in the evaporated case. In a field-effect transistor with bottom-gate bottom-contact geometry, the evaporated film exhibited a typical behavior of an n-type transistor. The degree of intermolecular order is thereby strongly dependent on the deposition method where vacuum deposition leads to a higher order. This higher order, however, impedes reorientation by annealing of the evaporated film but leads to improved charge transport between the electrodes even without homeotropic alignment of columnar liquid crystal.
Collapse
Affiliation(s)
- Juliana Eccher
- †Departamento de Física, Universidade Federal de Santa Catarina-UFSC, 88040-900 Florianópolis, Santa Catarina, Brazil
- ‡Department of Electronic Materials, Institute of Materials Science, Technical University of Darmstadt, Petersenstrasse 23, D-64287 Darmstadt, Germany
| | | | - Gregório C Faria
- §Instituto de Física de São Carlos, Universidade de São Paulo, PoB.:369, 13560-970 São Carlos/SP, Brazil
| | | | - Heinz von Seggern
- ‡Department of Electronic Materials, Institute of Materials Science, Technical University of Darmstadt, Petersenstrasse 23, D-64287 Darmstadt, Germany
| | - Wojciech Pisula
- ∥Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
- #Department of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Ivan H Bechtold
- †Departamento de Física, Universidade Federal de Santa Catarina-UFSC, 88040-900 Florianópolis, Santa Catarina, Brazil
| |
Collapse
|
45
|
Supramolecular Columnar Liquid Crystals Formed by Hydrogen Bonding between a Clicked Star-Shapeds-Triazine and Benzoic Acids. Chemistry 2015; 21:8859-66. [DOI: 10.1002/chem.201500477] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Indexed: 12/19/2022]
|
46
|
Sobolewski AL. Organic photovoltaics without p–n junctions: a computational study of ferroelectric columnar molecular clusters. Phys Chem Chem Phys 2015. [DOI: 10.1039/c5cp02448j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A ferroelectrically arranged intermolecular hydrogen bond network provides a force for splitting exciton into charge carriers and the generation of photovoltaic effects.
Collapse
|
47
|
Domoto Y, Busseron E, Maaloum M, Moulin E, Giuseppone N. Control over nanostructures and associated mesomorphic properties of doped self-assembled triarylamine liquid crystals. Chemistry 2014; 21:1938-48. [PMID: 25483214 DOI: 10.1002/chem.201405567] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Indexed: 11/10/2022]
Abstract
We have synthesized a series of triarylamine-cored molecules equipped with an adjacent amide moiety and dendritic peripheral tails in a variety of modes. We show by (1) H NMR and UV/Vis spectroscopy that their supramolecular self-assembly can be promoted in solution upon light stimulation and radical initiation. In addition, we have probed their molecular arrangements and mesomorphic properties in the bulk by integrated studies on their film state by using differential scanning calorimetry (DSC), variable-temperature polarizing optical microscopy (VT-POM), variable-temperature X-ray diffraction (VT-XRD), and atomic force microscopy (AFM). Differences in the number and the disposition of the peripheral tails significantly affect their mesomorphic properties associated with their lamellar- or columnar-packed nanostructures, which are based on segregated stacks of the triphenylamine cores and the lipophilic/lipophobic periphery. Such structural tuning is of interest for implementation of these soft self-assemblies as electroactive materials from solution to mesophases.
Collapse
Affiliation(s)
- Yuya Domoto
- SAMS research group University of Strasbourg, Institut Charles Sadron, CNRS, 23 rue du Loess, BP 84047, 67034 Strasbourg Cedex 2 (France); Present address: Department of Applied Chemistry, School of Engineering, 7-3-1, Hongo, Bunkyo-ku, Tokyo (Japan)
| | | | | | | | | |
Collapse
|
48
|
A novel straightforward synthesis of 2,4,6-triaryl-1,3,5-triazines via copper-catalyzed cyclization of N-benzylbenzamidines. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.10.091] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
49
|
Han K, Cho BK. Monoclinic to two-dimensional hexagonal transformation in hexacatenar molecules with a 1,2,3-triazole-based conjugated rod: morphology-dependent thermochromic behavior. SOFT MATTER 2014; 10:7588-7594. [PMID: 25207835 DOI: 10.1039/c4sm01051e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Novel hexacatenar molecules based on a 1,2,3-triazole-extended aromatic rod self-assemble into crystalline monoclinic and liquid crystalline hexagonal columnar structures depending on temperature. The phase transition may involve a conformational change from an anisotropic transoid to a half-disk cisoid conformer upon melting. In a hexacatenar molecule with sixfold octyl chains, the crystal-to-LC transition accompanies a photoluminescence color change from sky blue to dark blue, which is attributed to the formation of higher-order aggregates in the crystalline state.
Collapse
Affiliation(s)
- Kyuwon Han
- Department of Chemistry and Institute of Nanosensor and Biotechnology, Dankook University, Gyeonggi-Do, 448-701, Korea.
| | | |
Collapse
|
50
|
Lu LY, Kuo HM, Sheu HS, Lee GH, Lai CK. Polarization effects in mesogenic isoxazoles and 1,3,4-oxadiazoles. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.05.036] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|