Dibenzo[<i>a</i>, <i>c</i>]phenazine‐Based Donor‐Acceptor (D–A) Tetra Branched Molecules: Fine Tuning of Optical Properties

Boxi, Shatabdi; Jana, Dipak Kumar; Parui, Partha Pratim; Ghorai, Binay K.

doi:10.1002/slct.201801500

Cited by 7 publications

(4 citation statements)

References 63 publications

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“…These observations can be attributed to the unique structure of DPPI with imidazole and triphenylamine groups, which are sensitive to the micro-environments changed by the addition of TEA [ 44 , 45 , 46 ]. On one hand, TEA provides active hydrogen protons that result in acid-base interactions; on the other hand, it causes the electronic distribution and energy state changes in the ILCT-structured DPPI ligand due to molecular interactions [ 47 ], and leads to the color emission variations and the TEA detecting capabilities of the Eu 3+ -complex [ 48 , 49 ].…”

Section: Resultsmentioning

confidence: 99%

Visual Detection of Triethylamine and a Dual Input/Output Logic Gate Based on a Eu3+-Complex

Liu

Wang

et al. 2021

Molecules

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A series of Ln3+-metal centered complexes, Ln(TTA)3(DPPI) (Ln = La, 1; Ln = Eu, 2; Ln = Tb, 3; or Ln = Gd, 4) [(DPPI = N-(4-(1H-imidazo [4,5-f][1,10]phenanthrolin-2-yl)phenyl)-N-phenylbenzenamine) and (TTA = 2-Thenoyltrifluoroacetone)] have been synthesized and characterized. Among which, the Eu3+-complex shows efficient purity red luminescence in dimethylsulfoxide (DMSO) solution, with a Commission International De L’ Eclairage (CIE) coordinate at x = 0.638, y = 0.323 and ΦEuL = 38.9%. Interestingly, increasing the amounts of triethylamine (TEA) in the solution regulates the energy transfer between the ligand and the Eu3+-metal center, which further leads to the luminescence color changing from red to white, and then bluish-green depending on the different excitation wavelengths. Based on this, we have designed the IMPLICATION logic gate for TEA recognition by applying the amounts of TEA and the excitation wavelengths as the dual input signal, which makes this Eu3+-complex a promising candidate for TEA-sensing optical sensors.

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Section: Resultsmentioning

confidence: 99%

Visual Detection of Triethylamine and a Dual Input/Output Logic Gate Based on a Eu3+-Complex

Liu

Wang

et al. 2021

Molecules

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“…In recent years, phenazine-based derivatives have exhibited high light absorption capacity, superior photoelectric conversion efficiency, and excellent light stability. 30,31 Moreover, the nitrogen atom on the phenazine ring carries a lone pair of electrons, which can attract surrounding electrons through the π electron cloud on the heterocycle, giving the phenazine-based derivatives strong electron-accepting ability. They are commonly used in organic light-emitting diodes (OLEDs), 32,33 dye-sensitized solar cells (DSSCs), 34,35 electrochromic devices (ECDs), 36,37 and other fields.…”

Section: Introductionmentioning

confidence: 99%

Ternary Memory Devices Based on Copolymers of Dipyrido[3,2-a:2′,3′-c]phenazine Acceptor and Multiple Donors

Yu,

Du,

et al. 2024

ACS Appl. Polym. Mater.

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Donor–acceptor (D–A) conjugated polymers have exhibited their utility in the fabrication of memory devices with high information storage capacity. The device performance can be effectively regulated through the appropriate pairing of the acceptor and donor moieties. Six different D–A conjugated polymers, featuring varied structures, were synthesized by using the Suzuki coupling reaction. Donor molecules such as fluorene, carbazole, and 4′-methoxytriphenylamine, as well as the acceptor molecule dipyrido[3,2-a:2′,3′-c]phenazine (dppz), were employed in this process. Interestingly, it was observed that simply increasing the ratio of donor groups did not yield improvements in device performance. On the other hand, the memory devices fabricated using these polymers as the active layers exhibited favorable ternary resistance memory behavior. Specifically, the first and second threshold voltages were impressively low, at −0.40 and −0.75 V, respectively. The OFF: ON1: ON2 current ratio reached an outstanding ratio of 1:102.90:105.47. Moreover, these devices demonstrated excellent stability with a retention time of 104 s and an endurance of 103 cycles. In conclusion, this study successfully synthesized D–A conjugated polymer with dppz as an acceptor and proved the great potential of constructing ternary memory devices using the dppz structure.

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“…Phenazine scaffold are significant group of azo-polycyclic compounds that are widely found in various natural products and synthetic dyes [20] Further, the synthesized phenazine frameworks are identified as various pharmaceutical activities such as antitumor, antiinflammatory, antimicrobial, antifungal, antimalarial, antileishmanial, antihepatitis C viral replication and also act as insecticidal activities [21] Apart from their biological activities, the several natural and synthesized phenazine derivatives are used in various material chemistry applications such as organic semiconductors, [22] dye-sensitized solar cells (DSSCs), [23] promoter for proliferation, [24] electroluminescence devices, [25] photo-sensitizers in photodynamic therapy, [26] etc.…”

Section: Introductionmentioning

confidence: 99%

In(OTf)3 Catalyzed Regioselective Approach for Synthesis of Multi-Functionalized Benzopyranophenazine Derivatives as Latent Corrosion Inhibitors on Mild Steel in 1 M HCl

Leelakrishnan¹,

Elumalai

Jagadeesan

et al. 2022

Preprint

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A rapid and regioselective strategy have developed for synthesis of multi-functional phenazine derivatives such as 3- amino-1- (2-hydroxy phenyl) -1H- benzo[a] pyrano [2,3-c] phenazine -2- carbonitrile benzo-pyrano-phenazine (BPP), 3-amino-1-(2-hydroxy-5-methoxyphenyl)-1H-benzo[a]pyrano[2,3-c]phenazine-2-carbonitrile (MBPP) and 3-amino-1-(5-bromo-2-hydroxyphenyl)-1H-benzo[a]pyrano[2,3-c]phenazine-2-carbonitrile (BBPP) using In(OTf)3 as catalyst in simple one-pot multi-component reaction. Further, the regioselectivity of the product formation was confirmed by DFT studies. In addition, the synthesized compounds were evaluated for their corrosion inhibition strength on mild steel in 1 M hydrochloric acid solution by using weight loss and electrochemical techniques in the first time. Interestingly, the inhibition efficiency was increased up to 98.64 % with an increase in the inhibitor concentration and it was decreased with increases in temperature. These results indicate that our synthesized compounds adopt the Langmuir isotherm model. Further, the polarization measurements clearly indicate that synthesized phenazine derivatives act as mixed-type inhibitors. Also, the electrochemical impedance studies (EIS) strongly revealed that these compounds inhibit corrosion by adsorption mechanism. Moreover, the efficiency of corrosion inhibitors was explained by the surface morphology of the inhibited and uninhibited specimens and was examined using scanning electron microscopy (SEM). Finally, the correlation between the inhibition performance of phenazines and their structural parameters was clearly examined by DFT calculations.

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Dibenzo[a, c]phenazine‐Based Donor‐Acceptor (D–A) Tetra Branched Molecules: Fine Tuning of Optical Properties

Cited by 7 publications

References 63 publications

Visual Detection of Triethylamine and a Dual Input/Output Logic Gate Based on a Eu3+-Complex

Visual Detection of Triethylamine and a Dual Input/Output Logic Gate Based on a Eu3+-Complex

Ternary Memory Devices Based on Copolymers of Dipyrido[3,2-a:2′,3′-c]phenazine Acceptor and Multiple Donors

In(OTf)3 Catalyzed Regioselective Approach for Synthesis of Multi-Functionalized Benzopyranophenazine Derivatives as Latent Corrosion Inhibitors on Mild Steel in 1 M HCl

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