Studies on vibrational, dielectric, mechanical and thermal properties of organic nonlinear optical co-crystal: 2,6-diaminopyridinium–4-nitrophenolate–4-nitrophenol

Krishnakumar, V.; Rajaboopathi, M.; Nagalakshmi, R.

doi:10.1016/j.physb.2012.01.084

Cited by 37 publications

(10 citation statements)

References 23 publications

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“…The red shift observed in both the amine and the carboxyl group vibrations indicates that both functional groups are involved in ionic hydrogen bond interactions. CH vibration; As mentioned above, the aromatic C-H stretching vibration usually occurs in the 3100-3000 cm -1 region which in the present case is shared with O-H vibrations from the carboxylic acid involved in the hydrogen bonds (3100 to 2900 cm -1 ) [46,[48][49]. Thus, in the present case the region 2900-2600 cm -1 contains both vibrations ( Table 4).…”

Section: Ftir Vibrational Analysissupporting

confidence: 66%

Fluorescence and physical properties of the organic salt 2-chloro-4-nitrobenzoate–3-ammonium-phenol

et al. 2015

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Section: Ftir Vibrational Analysissupporting

confidence: 66%

Fluorescence and physical properties of the organic salt 2-chloro-4-nitrobenzoate–3-ammonium-phenol

et al. 2015

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“…In this study, we demonstrate THz emission from a novel organic crystal 2,6diaminopyridinium-4-nitrophenolate-4-nitrophenol (DAP + NP -NP) [11][12][13]. The field strength of the THz emission from a DAP + NP -NP crystal is comparable with that from a typical THz emitter-ZnTe crystal.…”

Section: Introductionmentioning

confidence: 86%

“…The DAP + NP -NP crystals used in this study were synthesized by slow-evaporation-solution method with ethanol as a solvent [11]. A photo of the used crystal is shown in the inset of Fig.…”

Section: Sample Preparation and Thz Emission Experimentsmentioning

confidence: 99%

THz emission from organic cocrystalline salt: 2, 6-diaminopyridinium-4-nitrophenolate-4-nitrophenol

Tu¹,

Chou²,

Chen³

et al. 2016

Opt. Express

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We report few-cycle THz pulses emission from a novel organic crystal 2,6-diaminopyridinium-4-nitrophenolate-4-nitrophenol (DAPNPNP). The observed amplitude of the THz electric field from a DAPNPNP crystal is comparable with that from a ZnTe single crystal under the same optical pumping conditions. Both the waveform and spectra of the THz radiation from DAPNPNP are similar to those from ZnTe. We conclude that a high quality DAPNPNP crystal would be a high potential candidate in THz generation and applications.

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“…Importantly, molecular properties such as efficacy against a biological target can be preserved or enhanced, a key issue if the API shows poor aqueous solubility and low oral bioavailability, with several cocrystal drug products being introduced to the market in recent years. 17 , 18 While the first piezoelectric cocrystals were reported in 1946, 19 it is only in the past decade that cocrystallization has been exploited to alter the electromechanical and optical properties of organic crystals, 20 , 21 endowing them with properties such as exceptionally high elastic moduli 22 and a large piezoelectric response. 23 , 24 Glycine cocrystallized with 2D materials (BN, MoS 2 , and WS 2 ) has also demonstrated piezoelectricity.…”

Section: Introductionmentioning

confidence: 99%

A Piezoelectric Ionic Cocrystal of Glycine and Sulfamic Acid

Guerin

Khorasani

Gleeson

et al. 2021

Crystal Growth & Design

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Cocrystallization of two or more molecular compounds can dramatically change the physicochemical properties of a functional molecule without the need for chemical modification. For example, coformers can enhance the mechanical stability, processability, and solubility of pharmaceutical compounds to enable better medicines. Here, we demonstrate that amino acid cocrystals can enhance functional electromechanical properties in simple, sustainable materials as exemplified by glycine and sulfamic acid. These coformers crystallize independently in centrosymmetric space groups when they are grown as single-component crystals but form a noncentrosymmetric, electromechanically active ionic cocrystal when they are crystallized together. The piezoelectricity of the cocrystal is characterized using techniques tailored to overcome the challenges associated with measuring the electromechanical properties of soft (organic) crystals. The piezoelectric tensor of the cocrystal is mapped using density functional theory (DFT) computer models, and the predicted single-crystal longitudinal response of 2 pC/N is verified using second-harmonic generation (SHG) and piezoresponse force microscopy (PFM). The experimental measurements are facilitated by polycrystalline film growth that allows for macroscopic and nanoscale quantification of the longitudinal out-of-plane response, which is in the range exploited in piezoelectric technologies made from quartz, aluminum nitride, and zinc oxide. The large-area polycrystalline film retains a damped response of ≥0.2 pC/N, indicating the potential for application of such inexpensive and eco-friendly amino acid–based cocrystal coatings in, for example, autonomous ambient-powered devices in edge computing.

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Studies on vibrational, dielectric, mechanical and thermal properties of organic nonlinear optical co-crystal: 2,6-diaminopyridinium–4-nitrophenolate–4-nitrophenol

Cited by 37 publications

References 23 publications

Fluorescence and physical properties of the organic salt 2-chloro-4-nitrobenzoate–3-ammonium-phenol

Fluorescence and physical properties of the organic salt 2-chloro-4-nitrobenzoate–3-ammonium-phenol

THz emission from organic cocrystalline salt: 2, 6-diaminopyridinium-4-nitrophenolate-4-nitrophenol

A Piezoelectric Ionic Cocrystal of Glycine and Sulfamic Acid

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