Maximum Absorption Wavelength Research Articles

Development and Validation of Stability Indicating UV-Spectrophotometric Method for the Estimation of Hesperidin in Bulk Drugs, Plant Extract, Ayurveda Formulation and Nanoformulation

Abstract: Introduction: In present work attempt has been made to develop and validate a simple and sensitive UV spectrophotometric method for estimation of Hesperidin from bulk drugs, plant extract, Ayurveda formulation and novel nanoformulation. Hesperidin is a heteropolycyclic aromatic bioflavonoid found abundance in citrus plants that has been developed into a topical nanoformulation for the treatment of anti-inflammatory activity. It has numerous anti-inflammatory, anti-cancer, and anti-arthritis effects. Objectives: To develop simple, precise, robust, sensitive and accurate UV-Spectrophotometric method for the estimation of hesperidin in bulk drugs, Plant extract, Ayurveda formulation and nanoformulation. Materials and Methods: The optimum condition for the analysis of the drug was established with methanol and water as solvent (1:1). Maximum absorption wavelength was found to be 284 nm with line equation y = 0.0672x +0.003. It showed linear response between the concentration ranges of 2-10 µg/ml. The linear regression coefficient was found to be 0.999. The method was validated for linearity, precision, ruggedness, specificity, sensitivity as per ICH guidelines and all the values of validation was found to be within the acceptance. Conclusion: The developed method was proved to be new, simple, consistent, and accurate it can be used in the pharmaceutical industry as a routine quality control parameter for raw material and formulation. Keywords: Hesperidin, Stability indicating, UV-Spectrophotometric, Ayurveda formulation, Nanoformulation.

DETERMINATION OF TOTAL FLAVONOID IN JAMU “X” WITH UV-VISIBLE SPECTROPHOTOMETRIC METHODS

Jamu is still the choice of Indonesian people as an alternative to modern medicine until now. As a cultural heritage of the Indonesian, jamu is still very popular from the west to the east of Indonesia. The enthusiasm of the Indonesian in consuming jamu has encouraged many traditional medicine industries to produce jamu with many kinds of claim. Jamu "X" is claimed to help maintain body health. This research was conducted to determine the total flavonoid content in jamu "X" calculated as rutin by UV-spectrophotometric method with aluminum chloride (AlCl3) reagent. Jamu "X" is a product with new formula that is expected to be marketed soon. The determination of the maximum absorbance wavelength of rutin was carried out at a wavelength of 400-800 nm and the resulting maximum absorbance wavelength of rutin was 416.5 nm. The determination of total flavonoid calculated as rutin determined using a linear regression equation from the rutin standard. The linear regression equation was determined from a rutin standard curve series with 10; 12.5; 15; 17.5 and 20 g/ml, respectively and the linear regression equation obtained y = 0.0275x + 0.093. The results of the determination of rutin in the jamu "X" were 1.474%; 1.474% and 1.469% with an average value of 1.472%.

Extraction and Preconcentration of Cd (II) by using Crown Ether DB18C6

Extracted Cd(II) as (CdCl3-) and (CdCl42-) from HCl media after preparing ion pair complexes according to liquid ion exchange method by using DB18C6 after changing to liquid ion exchanger K-Crown+; Cl-, spectrophotometric studies showed that the extracted ion pair complex had a wave length for maximum absorbance of λmax=277nm. Limitations to the study include optimum conditions for extraction in this study show a need for 0.3M HCl, to be present 50µg for Cd(II), in addition to study extracted complex structure by Slope ratio method, the result appear more probable structure of extracted complex [K DB18C6]+;HCdCl4- and [K-DB18C6]+; CdCl3-. This method applied to spectrophotometric determination of Cd(II) in different sample and compare the results with atomic absorption spectroscopy.

Development and Validation of UV Spectrophotometric Method for Doxazosin Mesylate in Bulk and Tablets

Doxazosin mesylate (DX) is an antihypertensive agent belonging to BCS class II. There is no reported literature available on development of spectrophotometric method for its analysis in bulk and pharmaceutical dosage forms using 0.1N HCl. Thus, attempt was made to develop and validate a new UV spectrophotometric method using 0.1N HCl as the solvent for its quantitative estimation in tablets that would be fast, simple, accurate, and sensitive. DX had a maximum absorbance wavelength of 245 nm and was linear with a correlation coefficient (R2) of 0.9981 across the concentration range of 2-14 μg/mL. The present method was utilized to determine the drug content of two commercial brands namely; brand I and brand II. The estimated amount of DX was 99.13% and 99.02% in these brands, respectively. The proposed method generated results that confirm the label claim and was accurate, precise, sensitive, and rugged during its validation study. The accuracy of the technique was tested using recovery research at three different levels, namely 80%, 100%, 120%, and the percent recovery rate was determined between 98% and 102% suggesting that the proposed approach is accurate. Precision and robustness were within the acceptable limits, complying with ICH standards. The proposed method could be used to quantify DX in API and dosage forms.

Absorption Properties of Polyvinyl Alcohol Films Filled with Nanoparticles Doped with Acridine Orange Dye

Polyvinyl Alcohol (PVA) polymer/ Acridine Orange (AO) dye films prepared via casting technique at room temperature. The effect of adding (Acridine Orange (AO) dye solution, Magnesium Oxide (MgO), and Aluminum Oxide (Al2O3) NPs) to the PVA polymer matrix were studied on the absorption spectra. The effect of AO addition on the absorption spectrum of PVA film is occurrence blue shift (5nm) from 280nm to 275 nm in the PVA and red shift (10nm) from 490nm to be 500 nm for AO maximum absorbance wavelength. The absorbance of AO dye decreases when adding PVA, but increases When the volume ratio of AO dye solution is increased to 0.49 for 18ml, the volume ratio of AO dye solution decreases for 24- and 30-ml volume ratios. Adding NPs led to enhancing the photophysical properties of polymer composite, noted that absorbance of adding alumina nanoparticles more than it is in the case of adding magnesia nanoparticles. Also, there is a 10 nm red shift in AO and a 5 nm blue shift in AO when they are added to the polymer matrix filled with MgO and Al2O3 NPs.

π-Pimer, π-Dimer, π-Trimer, and 1D π-Stacks in a Series of Benzene Triimide Radical Anions: Substituent-Modulated π Interactions and Physical Properties in Crystalline State

π-Pimer, π-Dimer, π-Trimer, and 1D π-Stacks in a Series of Benzene Triimide Radical Anions: Substituent-Modulated π Interactions and Physical Properties in Crystalline State

Influence of End-Capped Modifications in the Nonlinear Optical Amplitude of Nonfullerene-Based Chromophores with a D-π-A Architecture: A DFT/TDDFT Study.

Nonlinear optical (NLO) materials have several uses in many fields such as solid physics, biology, medicine, nuclear physics, and material research. Therefore, a series of nonfullerene-based derivatives (CC10D1–CC10D8) with a D−π–A configuration was planned for the NLO investigation using CC10R as the reference molecule with structural alternations at acceptor moieties. Natural bonding orbital (NBO), UV–vis spectra, frontier molecular orbitals (FMOs), global reactivity parameters (GRPs), transition density matrix (TDM), and density of states (DOS) were analyzed using the M06/6-311G(d,p) functional in chloroform solvent to understand the NLO responses of CC10R and CC10D1–CC10D8. The highest occupied molecular orbital (HOMO)–lowest unoccupied molecular orbital (LUMO) band gaps of CC10D1–CC10D6 were illustrated to be lower than that of CC10R, with the larger bathochromic shift (726.408–782.674 nm) resulting in a significant NLO response. Along with the band gap, the FMO method also identified an efficient interfacial charge transfer from D to A moieties via a π-bridge, which was further supported by the DOS and TDM map. Moreover, NBO calculations demonstrated that extended hyperconjugation and strong internal molecular interactions were important in their stabilization. The dipole moment (μ), linear polarizability ⟨α⟩, hyperpolarizability (βtotal), and second-order hyperpolarizability (γtotal.) were studied for CC10R and CC10D1–CC10D8. Among all of the derivatives, CC10D2 was proven to be the most appropriate candidate because of its suitable NLO behavior such as being well-supported by a reduced band gap (2.093 eV) and having a suitable maximum absorption wavelength (782.674 nm). Therefore, CC10D2 was reported to have a greater value of first hyperpolarizability (208 659.330 a.u.) compared with other derivatives and CC10R. For the second hyperpolarizability, a greater value was obtained for CC10R (5.855 × 107 a.u.), and its derivatives showed results comparable to that of the parent chromophore for γtotal. This theoretical framework reveals that structural customization with different acceptor units plays a significant role in obtaining attractive NLO materials for optoelectronic applications.

Synthesis of Vapochromic Dyes Having Sensing Properties for Vapor Phase of Organic Solvents Used in Semiconductor Manufacturing Processes and Their Application to Textile-Based Sensors.

Two vapochromic dyes (DMx and DM) were synthesized to be used for textile-based sensors detecting the vapor phase of organic solvents. They were designed to show sensitive color change properties at a low concentration of vapors at room temperature. They were applied to cotton fabrics as a substrate of the textile-based sensors to examine their sensing properties for nine organic solvents frequently used in semiconductor manufacturing processes, such as trichloroethylene, dimethylacetamide, iso-propanol, methanol, n-hexane, ethylacetate, benzene, acetone, and hexamethyldisilazane. The textile sensor exhibited strong sensing properties of polar solvents rather than non-polar solvents. In particular, the detection of dimethylacetamide was the best, showing a color difference of 15.9 for DMx and 26.2 for DM under 300 ppm exposure. Even at the low concentration of 10 ppm of dimethylacetamide, the color change values reached 7.7 and 13.6, respectively, in an hour. The maximum absorption wavelength of the textile sensor was shifted from 580 nm to 550 nm for DMx and 550 nm to 540 nm for DM, respectively, due to dimethylacetamide exposure. The sensing mechanism was considered to depend on solvatochromism, the aggregational properties of the dyes and the adsorption amounts of the solvent vapors on the textile substrates to which the dyes were applied. Finally, the reusability of the textile sensor was tested for 10 cycles.

UV-Vis Spectroscopy, Electrochemical and DFT Study of Tris(β-diketonato)iron(III) Complexes with Application in DSSC: Role of Aromatic Thienyl Groups.

A series of tris(β-diketonato)iron(III) complexes, with the β-diketonato ligand bearing different substituent groups, have been synthesized and characterized by Fourier transform infrared (FT-IR), ultraviolet-visible (UV-Vis) and mass spectroscopic methods. The maximum band UV-Vis absorption wavelengths of the tris(β-diketonato)iron(III) complexes were in the range of 270–380 nm. The complexes have very good solubility in various solvents such as chloroform, dichloromethane, ethyl acetate, tetrahydrofurane, dimethylsulphoxide and dimethylformamide. After the syntheses and characterization processes, spectroscopic and electrochemical properties of these tris(β-diketonato)iron(III) complexes were investigated. A density functional theory (DFT) study related to the spectroscopic and electrochemical properties of the tris(β-diketonato)iron(III) complexes was used to investigate the possible application of these complexes as dye sensitizers or redox mediators in dye-sensitized solar cells.

Exploration of nonlinear optical enhancement and interesting optical behavior with pyrene moiety as the conjugated donor and efficient modification in acceptor moieties

Herein, a series of new pyrene based hexylcyanoacetate derivatives (HPPC1–HPPC8) with A–π–D–π–D configuration were designed by end-capped modeling of non-fullerene acceptors on the structure of reference compound named dihexyl 3,3'-(pyrene-1,6-diylbis(4,1-phenylene))(2E,2'E)-bis(2-cyanoacrylate) HPPCR. Quantum chemical calculations of HPPCR and HPPC1–HPPC8 were accomplished at M06/6-31G(d, p) level. The stability of molecules due to the strongest hyper conjugative interactions in HPPCR and HPPC1–HPPC8 was estimated through NBO study. Interestingly, HOMO–LUMO band-gap of HPPC1–HPPC8 was found smaller than HPPCR which resulted in large NLO response. Among all the investigated compounds, HPPC7 showed the larger NLO response due to the presence of four cyanide (CN) groups which strengthens the bridge conjugation, and its band gap was found to be 2.11 eV, smaller as compared to band gap of HPPCR (3.225 eV). The absorption spectra of HPPC1–HPPC8 compounds showed maximum absorption wavelengths (483–707 nm) than HPPCR (471.764 nm). The designed compounds showed high NLO response than HPPCR. Amazingly, highest amplitude of linear polarizability < α > , first hyperpolarizability (βtotal) and second hyperpolarizability < γ > for HPPC7 were achieved to be 1331.191, 200,112.2 and 4.131 × 107 (a.u), respectively. NLO response showed that the HPPC1–HPPC8 might be potential candidates for NLO applications.Graphical abstract

Exploration for the Optical Properties and Fluorescent Prediction of Nitrotriazole and Nitrofurazan: First-Principles and TD-DFT Calculations.

High-energy materials containing azole and furazan have revealed numerous properties; however, the underlying optical properties need to be solved. Meanwhile, the uncertainty for the choice of fluorescent matrix materials and the flexible situational conditions prompted us to estimate the optical and fluorescent properties of 5,5′-dinitro-2H,2H′-3,3′-bi-1,2,4-triazole (DNBT), 4,4′-dinitroazolefurazan (DNAF), and 4,4′-dinitro-3,3′-4,3′-ter-1,2,5-oxadiazole (DNTO). The first-principles calculation with improved dispersion correction terms and time-dependent density functional theory were utilized to calculate the absorbance and excitation energy of DNBT, DNAF, and DNTO, as well as characterization for their crystal structure, electronic structure, molecular orbitals, and so forth, synchronously. In this work, the absorbance anisotropy of DNBT and DNTO is stronger than that of DNAF. The absorbance for each of the (0,0,1) crystal planes in the three compounds is greater than that of the other two crystal planes. Moreover, DNBT has the maximum absorbance on the (0,0,1) crystal plane. The N–N–H from DNBT and N–O–N from DNTO and DNAF are responsible for these results, while N=N in DNAF weakens the performance of N–O–N. UV–vis spectra show that the maximum absorption wavelengths λmax for DNBT, DNAF, and DNTO are 225, 228, and 201 nm, respectively. The number of five-membered rings and the coplanarity of groups in the intermolecular non-conjugation interaction potentially improve this ability due to the results from the crystal diffraction analysis. In addition, the polarization rate DNBT > DNTO > DNAF based on the molecular orbital analysis and the electrostatic potential calculation implies that the excitation energy of DNBT is less than DNTO, and the excitation energy of DNTO is less than DNAF. This work is beneficial to the expansion of energetic materials into the optical field and the accelerated application process of the related industry.

Meso-carbazole substituted porphyrin complexes: Synthesis and spectral properties according to experiment, DFT calculations and the prediction by machine learning methods

In this work, two porphyrins bearing [3,6-di-tert-butyl-carbazol-9-yl-benzoyloxy)]- (1) and [3,6-bis(3′,6′-di(tert-butyl)-9′H-carbazol)-9H-carbazolbenzoyloxy]phenyl (2) groups and their zinc (1Zn, 2Zn)/cobalt (1Co, 2Co) complexes were synthesized and studied by experimental and theoretical methods. The spectral parameters (UV–vis absorption/femtosecond transient absorption/fluorescence, IR, 1H NMR, mass spectra) of the compounds were observed. Their structure was also examined by the DFT method. The comparative study of the UV–vis spectra by the DFT/TDDFT calculation, and by the prediction of the Soret band maximum using machine learning methods, namely the consensus models based on the data of over 10000 porphyrin free bases and their complexes with metals was performed. The absorption maximum wavelength (Soret band) of porphyrins predicted with machine learning methods showed better agreement with the experimental data compared to the DFT/TDDFT calculation. The final consensus model is freely available at https://ochem.eu/article/145340 and can be used by the other researchers to obtain new functionalized porphyrins with desired optical properties.

Near-Infrared Absorbing Molecule Based on Triphenylamine Radical Cation with Extended Homoaryl π-System

Four triphenylamines with extended π-systems were synthesized. Cyclic voltammetry (CV) measurements showed that they gave radical cations, which are stable in solution. Radical cations obtained upon one electron chemical oxidation showed strong absorption in the near-infrared region. The radical cations of the naphthalene-substituted derivatives show a maximum absorption wavelength above 1000 nm and are classified as NIR-II dyes. Molecular design rules of novel near-infrared absorbing dyes are described.

Rearrangement of aniline(H2O)n (n = 0–12) clusters upon photoionization and their excited state properties: Density functional theory and time‐dependent density functional theory study

AbstractWe have studied H‐bonded structural rearrangement in the S0, S1, and D0 states of neutral and cationic aniline+(H2O)n (n = 0–12) clusters by adopting density functional (DFT) and time‐dependent DFT (TD‐DFT) theory. DFT‐calculated structural rearrangement energies (SRE) increased sharply for n = 1, 2, remained nearly the same until n = 9, and increased again from n = 10 to larger clusters. This indicates that the intramolecular vibrational modes play a central role in the rearrangement energy. On the other hand, DFT‐calculated thermochemical data confirmed that there is no significant change in enthalpy (H), Gibb's free energy (G), and entropy (S) for neutral and ionized clusters. The maximum UV absorption wavelength, λmax red‐shifted gradually with the increase of cluster size with respect to aniline as the hydration reduces the excitation energies. On the other hand, there was no significant change in the highest occupied molecular orbital (HOMO)‐lowest unoccupied molecular orbital (LUMO) energy gap.

Simple spectrophotometric method for the determination of haloperidol from pharmaceutical formulations

A simple, sensitive, rapid, accurate and cost effective spectrophotometric method has been developed and validated for the estimation of haloperidol in bulk drug and for its pharmaceutical formulations. The proposed method is based on the formation of chloroform extractable ion pair complex of haloperidol with bromothymol blue. The absorbance of the coloured extractable ion pair complex is measured at the wavelength of maximum absorbance 420 nm against the reagent blank. Beer’s law is obeyed over a concentration range of 20 to 100 µg/ml of haloperidol, for a linear calibration curve. Results are statistically validated and found to be reproducible.

Impact of side-chain engineering on the A-π-D-π-A type SM-BF1 donor molecule for bulk heterojunction and their photovoltaic performance: A DFT approach

A hot topic in the field of photovoltaics is to minimize the energy loss during exciton dissociation by maximizing the balance between the acceptors and donors in the light-absorbing layer of organic solar cells (OSCs). For this reason, the bulk heterojunction (BHJ) with different blends of donor-acceptor materials is leading the research work in OSCs. We have introduced a series of eight novel donor molecules by the substitution of the terminal acceptor moieties on the A-π-D-π-A type reference molecule SM-BF1 (taken as R) that could be utilized in the blend of BHJ-OSCs. The frontier molecular orbitals, transition density matrix, density of states, molecular electrostatic potential, binding energy, excitation energy, maximum absorption wavelength, and some other photovoltaic attributes of the proposed molecules were analyzed through density functional theory and its time-dependent appoach. Though almost all of the newly derived molecules were a step up from the reference molecule in most of the studied characteristics, the F2 molecule seemed to conquer them all due to its desirable properties such as highest wavelength of maximum absorption (λmax), open-circuit voltage, fill factor, and lowest excitation and binding energy, etc. Also, the studied morphology, optical characteristics, and electronic attributes of the proposed molecules signified the fact that most of these molecules showed enhanced charge transfer, and could provide a maximum quantum yield of solar energy supplied.

A photo-induced colorimetric reaction of N,N'-bis[2-(trimethylammonium)ethyl]-1,8:4,5-naphthalenetetracarboxdiimide for detection of carboxylate anions

Here we show a novel colorimetric sensor system with a photo-induced colorimetric reaction of N,N'-bis[2-(trimethylammonium)ethyl]-1,8:4,5-naphthalenetetracarboxdiimide (TENDI) to detect and quantify carboxylate derivatives. In the presence of CH3COONa, TENDI aqueous solution under UV irradiation shows a photo-induced colorimetric reaction, which is due to the production of naphthalenediimide (NDI)-based radical anions whose absorbance peaks appear at around 400–600 nm. In contrast, no color changes are observed in the cases of diverse inorganic salts. In addition, TENDI shows another ability to discriminate the structural features of carboxylate derivatives by color tone. Moreover, interestingly, the Hill equation can approximate the relationship between carboxylate concentrations and absorbance values on the maximum absorbance wavelengths of the absorbance peaks due to the NDI-radical anions.

Ready-to-use optical H2O2 sensor based on stimuli-responsive polyacrylic film and nanofibers containing spiropyran

Nowadays, design of conventional and efficient optical H2O2 sensors would be of great importance due to their lower cost and ease of follow-up, compared to the other widely used techniques such as electrochemical or chromatographic methods. Here, stimuli-responsive sensors containing photochromic (R/S)-2-(3′,3′-dimethyl-6-nitro-3′H-spiro[chromene-2,2′-indole]-1′-yl) ethanol (SPOH) and acrylic terpolymer film or nanofibers were prepared for H2O2 detection through a reaction-induced and concentration-dependent process. The polymer phase acts as an efficient substrate for exploitation of such sensors in aqueous media. Poly(methyl methacrylate-butyl acrylate-hydroxyethyl methacrylate) (MBH) was prepared via miniemulsion polymerization and its chemical structure was characterized by FTIR and 1H NMR spectroscopies. Then, it was doped with SPOH and the corresponding film (MBH/SPOH@F) and nanofibers (MBH/SPOH@NF) were fabricated via spin-coating and electrospinning techniques, respectively, and their morphologies were investigated by SEM. Colorimetric analyses were employed to evaluate performance of the obtained samples toward H2O2 after sensitization by UV irradiation. Both samples demonstrated visual color changes together with decrement in maximum absorption wavelengths with the increase in H2O2 concentration. Limit of detection (LOD) for MBH/SPOH@F and MBH/SPOH@NF were calculated to be 11 and 2.3 mg/dL, respectively. Moreover, MBH/SPOH@NF showed faster response (50 min) with respect to MBH/SPOH@F (60 min). Enhanced sensitivity of MBH/SPOH@NF comes from higher specific surface area and porosity of the nanofibers compared to the corresponding film. This led to more accessibility of H2O2 to SPOH molecules in the detection process. Finally, practical application of the ready-to-used and solid sensor was validated with the recovery of 94–97% in water resources.

Nano-photocatalytic Mineralization and Degradation of Dye Acid Orange 7 on Titanium Dioxide Coated Layers in a Batch Mode Plate Photo Reactor: Role of Flow Rate and Inorganic Salts

Recently, the environmental impact of discharged untreated dye wastewater has received extensive attention. Herein, the paper investigated the photocatalytic degradation of dye Acid Orange 7 in a batch mode photoreactor fitted with a TiO2 coated layer of dimensions (10cmí—15cm). The coated layer was prepared by sedimentation from an aqueous suspension of c=5 g.L-1 and annealed at 300°C. Polychromatic sun beds lamps were used as a source of Ultra Violet (UV) light with maximum intensity at λ= 365 nm. A UV-Vis spectrophotometer monitored changes in dye concentrations at = 485 nm. Photocatalytic degradation of dye Acid Orange 7; c= (2.5í—10-5 mol. L-1) was determined by changes in dye concentration under UV light irradiation. The results show that dyes can be effectively degraded by TiO2photocatalyst and UV light of wavelength 300-400 nm. The effect of flow rate and inorganic salts (sodium carbonate, sodium sulfate) on dye Acid Orange 7 degradation was examined. The maximum absorption wavelength and maximum coefficient of molar absorptivity ) was determined at 485 nm and 20647 dm3.mol-1.cm-1. The presence of CO32- ions in the dye solution accelerated photocatalytic degradation by 35.8% and 39.3% after 30 minutes and 60 minutes of photocatalytic degradation. Dye photodegradation was reduced by 76.4% after 2.5 hours of photocatalytic treatment with SO42- ions dissolved in dye solution. Presence of SO42-ions showed no effect. Additionally, a flow rate of 50 lit/hr. was effective by 85.1% compared to 100 lit/hr. after 4 hours of photocatalytic degradation.

Highly selective and sensitive colorimetric probes for Cu2+ ions based on ethoxyaniline croconaine dyes

Two highly sensitive and selective colorimetric ethoxyaniline croconaine dye probes, (E)-2-((2-ethoxyphenyl)amino)-5-((2-ethoxyphenyl)iminio)-3,4-dioxocyclopent-1-en-1-olate (ONKT) and (E)-2-((4-ethoxyphenyl)amino)-5-((4-ethoxyphenyl)iminio)-3,4-dioxocyclopent-1-en-1-olate) (PNKT) for sensing of Cu2+ ion have been synthesized and characterized. Compared with other metal cations tested, the colorimetric behavior of the probes is significantly different in the presence of Cu2+ ions. When Cu2+ ions were added, the colors of ONKT and PNKT changed from orange to colorless, and the absorbance at the maximum absorption wavelength decreased obviously. The probes have been proved to be sensitive, selective, linear and low in detection limit for Cu2+ ions. In addition, with Cu2+ and EDTA as input signals and the absorption intensity of ONKT at 500 nm as output signal, ONKT is designed as a molecular logic gate with storage and deletion functions. Therefore, these probes provide a new colorimetric method for qualitative and quantitative selective detection of copper ions.