Columnar Liquid Crystals of Copper(I) Complexes with Ionic Conductivity and Solid State Emission
Abstract
:1. Introduction
2. Results and Discussions
2.1. Synthesis and Structural Characterization
2.2. Characterization of Liquid Crystalline Properties
2.2.1. DSC and POM Studies
2.2.2. Thermal Decomposition
2.2.3. X-ray Diffraction Investigation
2.3. UV–VIS and Emission Properties
2.4. Dielectric Spectroscopy
2.4.1. Electrical Conductivity
2.4.2. Dielectric Properties
3. Conclusions
4. Experimental Section
4.1. Characterization Methods
4.2. Preparation of N-(4-Perfluorooctylphenylcarbamothioyl)-3,4-Diheptyloxybenzamide (1)
4.3. Preparation of Copper(I) Complexes (Cu2a and Cu2b)
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
Sample Availability
References
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Compound | Transitions (T/K, ∆H/kJmol−1) 1,2 |
---|---|
1 (BTU) | 1st: Cr 386 (45.1) Iso 373 (2.1) SmA 365 (33.2) Cr 2nd: Cr 385 (45.0) Iso 373 (2.0) SmA 364 (32.9) Cr |
Cu2a | 1st: g 318 Colh 430 (22.9) Iso 429 (23.0) Colh 318 g 2nd: g 318 Colh 429 (22.8) Iso 428 (23.0) Colh 318 g |
Cu2b | 1st: Cr 363 (7.9) Cr’ 412 (18.0) Colh 441 (16.7) Iso 440 (16.9) Colh 313 g 2nd: g 313 Colh (17.1) 440 Iso 439 (17.2) Colh 313 g |
Compound | Mesophase | T(K) | Indexation | d-Spacing | d-Spacing | Lattice |
---|---|---|---|---|---|---|
exp.(Å) | calc. (Å) | parameter (Å) a | ||||
Cu2a | Colh | 388 | 100 | 24.94 | 24.94 | a = 28.80 |
110 | 14.24 | 14.40 | ||||
200 | 12.34 | 12.47 | ||||
210 | 9.28 | 9.43 | ||||
300 | 8.22 | 8.31 | ||||
Cu2b | Colh | 388 | 100 | 25.52 | 25.52 | a = 29.48 |
110 | 14.67 | 14.73 | ||||
200 | 12.62 | 12.76 | ||||
210 | 9.52 | 9.64 | ||||
300 | 8.42 | 8.51 |
Compound | Absorption, λmax/nm (ε × 10−3/M−1 cm−1) | Emission | ||
---|---|---|---|---|
Solid λem/nm (λexc = 365nm) | τ/μs | Φ (%) | ||
1 | 290 (20.4), 313 (26.4) | - | - | - |
Cu2a | 291 (45.7), 317 (54.9) | 545, 580 (sh) | 11, 172 | 2.5 |
Cu2b | 290 (sh, 34.4), 316 (41.4) | 546, 580 (sh) | 9, 176 | 8.0 |
Compound | Conductivity (σ/S·cm−1) | EA (Mesophase) | |||
---|---|---|---|---|---|
Glass | Mesophase | Isotropic | |||
320 K | 370 K | 400 K | 450 K | (eV) | |
Cu2a | 5.05 × 10−12 | 1.32 × 10−9 | 1.12 × 10−8 | 1.88 × 10−6 | 1.2 |
Cu2b | 2.64 × 10−12 | 1.86 × 10−9 | 4.98 × 10−8 | 3.03 × 10−6 | 1.5 |
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Cîrcu, V.; Ganea, C.P.; Secu, M.; Manaila-Maximean, D.; Marinescu, G.C.; Popescu, R.G.; Pasuk, I. Columnar Liquid Crystals of Copper(I) Complexes with Ionic Conductivity and Solid State Emission. Molecules 2023, 28, 4196. https://doi.org/10.3390/molecules28104196
Cîrcu V, Ganea CP, Secu M, Manaila-Maximean D, Marinescu GC, Popescu RG, Pasuk I. Columnar Liquid Crystals of Copper(I) Complexes with Ionic Conductivity and Solid State Emission. Molecules. 2023; 28(10):4196. https://doi.org/10.3390/molecules28104196
Chicago/Turabian StyleCîrcu, Viorel, Constantin P. Ganea, Mihail Secu, Doina Manaila-Maximean, George Cătălin Marinescu, Roua Gabriela Popescu, and Iuliana Pasuk. 2023. "Columnar Liquid Crystals of Copper(I) Complexes with Ionic Conductivity and Solid State Emission" Molecules 28, no. 10: 4196. https://doi.org/10.3390/molecules28104196