Spectra Of Solutions Research Articles

Raman-based in situ concentration measurement of boric solution with high accuracy and stability

In this paper, a quantitative analysis of boric acid solutions’ concentration with high accuracy is demonstrated by Raman spectroscopy. The in-situ concentration measurement model is developed by an elastic net against Raman spectral data. The R 2 of the elastic net model in the test set prediction can reach 0.9960. Compared with the partial least squares method used in traditional quantitative model, the method proposed in this paper shows excellent performance with low measurement error and high stability. One hundred and twenty groups of Raman spectra of boric solution with different concentrations and flow rates are used for training and validation of the model. The mean relative prediction error of the elastic net model was reduced from 7.1 to 1.9% in comparison with the models based on linear regression and the partial least squares. The verification test of various concentrations of boric acid solution shows that the detection error is <2% when the concentration is below 2000 mg/L. The study provides a reference for improving the in-situ quantitative detection accuracy by using Raman spectroscopy.

Novel insights into high-order dispersion and soliton dynamics in optical fibers via the perturbed Schrödinger–Hirota equation

This study offers a comprehensive analysis of the Perturbed Schrödinger -Hirota Equation (PSHE), crucial for understanding soliton dynamics in modern optical communication systems. We extended the traditional Nonlinear Schrödinger Equation (NLSE) to include higher-order nonlinearities and spatiotemporal dispersion, capturing the complexities of light pulse propagation. Employing the modified auxiliary equation method and Adomian Decomposition Method (ADM), we derived a spectrum of exact traveling wave solutions, encompassing exponential, rational, trigonometric, and hyperbolic functions. These solutions provide insights into soliton behaviors across diverse parameters, essential for optimizing fiber optic systems. The precision of our analytical solutions was validated through numerical solutions, and we explored modulation instability, revealing conditions for soliton formation and evolution. The findings have significant implications for the design and optimization of next-generation optical communication technologies.

Neutron stars in extended scalar-Gauss–Bonnet gravity: the richness of the solution spectrum

Neutron stars are natural laboratories for testing gravity in the strong field regime. That is why the full spectrum of neutron star solutions in different modified theories should be thoroughly studied. Among the most natural modifications of general relativity are the theories in which additional scalar degrees of freedom are present. That is why scalar-tensor theories like Brans–Dicke and Damour–Esposito–Farese theories, as well as their extensions such as scalar-Gauss–Bonnet gravity, attracted attention throughout the years. In the present work, we combine those theory families and explore extensively the neutron star solution space in their realm. We identify qualitative new behavior of the solutions, including the existence of new types of phase transitions and new branches of solutions present only for high neutron star masses. Due to the peculiarities of the solutions, they can not be easily mimicked by a simple change of the equation of state.

Extension of the molar absorption coefficient for non-ideal mixtures: an application to aqueous monovalent alcohol solutions.

The hydration state of the alcohols was investigated using the extended molar absorption coefficient, which redefines the molar absorption coefficient as a differential coefficient of concentration. The extended molar absorption coefficient is a function of the concentration calculated from the difference in absorbance, and is consistent with the conventional molar absorption coefficient, allowing a complete quantitative comparison. The quantitative performance was verified using IR and NIR absorption spectra of aqueous solutions of monovalent alcohols (methanol, ethanol, 1-propanol, 2-propanol, and tert-butanol) that were soluble in water at any mixing ratio. Extended molar absorption coefficient spectra were calculated for the combination bands of water, which were further separated by multivariate curve resolution-alternating least squares (MCR-ALS) into molecular species with different peak wavenumbers: strongly hydrogen-bonded (SHB), weakly hydrogen-bonded (WHB), and free OH species. The number of water species that change when one alcohol molecule increases, i.e., the perturbed hydration number (PHN), was calculated by comparison with the conventional molar absorption coefficient of pure water. The calculated PHN indicates that the numbers of SHB and WHB species are reversed at approximately 20 wt%, and that the free OH species increase at higher alcohol concentrations and are more pronounced for alcohols with bulky alkyl groups. These results provide a quantitative answer to the long-debated question of anomalies in water-alcohol mixing.

Pagodane—Solution and Solid-State Vibrational Spectra

In the present study, we report infrared and Raman spectra in both solution and the solid state, together with a state-of-the art inelastic neutron scattering spectrum, of the unusual molecule pagodane. Periodic DFT calculations have enabled a complete assignment of all the modes. The isolated molecule has D2h symmetry, which is reduced to Ci in the solid state. However, the preservation of the centre of symmetry means that the selection rules for infrared and Raman spectroscopy are almost unchanged. The exceptions are the D2hAu modes that are forbidden in the isolated molecule but become allowed in the solid state. These have been located in the solid-state spectra.

Exploring photophysical behavior and fullerene-induced quenching in difluoroboron flavanone [formula omitted]-diketonates for application in organic electronic devices: Experimental and theoretical analysis

The photophysical properties of two difluoroboron flavanone β-diketonates (DK1 and DK2) and their interaction with fullerene (C60) in toluene solution and spin-coated films were investigated using time-correlated single-photon counting, absorption spectroscopy, and steady-state fluorescence spectroscopy. In molecular crystal, the complexes exhibited red-shifted absorption and emission relative to their spectra in solution. Additionally, both complexes displayed bi-exponential decay behavior in time-resolved fluorescence measurements, indicating their capability to form both H and J types of aggregates in the solid state. The introduction of C60 resulted in significant fluorescence quenching and reduced excited-state lifetimes for both complexes. This quenching, observed in both solution and spin-coated films, was primarily driven by photo-induced electron transfer (PET) processes, underscoring the potential of these complexes as donors in fullerene-based heterojunction organic solar cells. To elucidate the process of aggregate formation and the impacts of different dimerization types within the crystalline structure of the complexes, first-principles calculations using Density Functional Theory (DFT) and time-dependent density functional theory (TD-DFT) were performed. We also employed DFT to explore various DK configurations on the fullerene surface, evaluating intermolecular distances and formation energies. These calculations highlighted the energetically favourable gap between the low-lying LUMO levels of the complexes and C60, confirming their suitability for such applications.

EXACT SOLUTIONS OF NONLINEAR FRACTIONAL CAHN–ALLEN EQUATION ARIES IN DIFFERENT NONLINEAR PHYSICAL PHENOMENON USING UNIFIED TECHNIQUE

The nonlinear fractional Cahn–Allen (NFCA) equation provides insight into phase modifications and pattern elaboration in natural structures, clarifying how various states of matter have changed throughout time. By using a unified technique, this study aims to present novel, precise solutions to the NFCA problem. This method has led to the discovery of a broad spectrum of soliton solutions, ranging from dark compactons and dark solitons to periodic kink behaviors, rough wave behaviors, and periodic patterns featuring peaked crests and troughs. It has also unveiled anti-kink periodic behaviors, periodic wave behaviors, bright-dark single solitons, periodic patterns displaying anti-peaked crests and anti-troughs, bright solitons, and compound soliton phenomena. Notably, these accomplishments have been made possible through the utilization of Maple software. These findings are important for fractional nonlinear dynamical models (FNLDMs). In order to clarify many dynamic behaviors that solutions of the NFCA equation display in other scientific fields, such as quantum mechanics, mathematical biology, and plasma physics, contour plots and 3D surface representations of these exact solutions are also featured. Through our investigation using the unified technique, we have unveiled a plethora of novel discoveries. Employing this method has revealed a total of 54 fresh findings. In contrast, Javeed et al. [S. Javeed, S. Saif and D. Baleanu, New exact solutions of fractional Cahn–Allen equation and fractional DSW system, Adv. Differential Equations 2018 (2018) 459] applied the first integral technique, resulting in only eight outcomes. Upon comparing their results with ours, our approach has yielded an additional four out of six innovative results. As far as we are aware, the application of our technique to the NFCA equation has not been previously documented. We anticipate that future research will expand this methodology to include other FNLDMs.

Forward-Scattering and Multiple-Scattering Sources of Errors in UV-Visible Spectroscopy of Microspheres.

Conventional UV-visible spectroscopy instruments measure the extinction spectrum of solutions in a transmission configuration. Because of the finite (nonzero) acceptance angle in detection, errors due to forward scattering and multiple scattering can be introduced when measuring scattering samples. We here experimentally quantify these errors using polystyrene spheres of different sizes for two representative analytical/research UV-visible instruments, one based on a single-beam diode array and the other on a double-beam scanning configuration. The measured spectra for particles larger than 1 μm are shown to differ between the two instruments, even at low concentrations, and also vary with concentration (in contradiction with the Beer-Lambert law). We show that systematic errors in the range of 10-40% are common in such measurements. We propose a model accounting for both forward- and multiple-scattering errors and demonstrate its agreement with our experimental results. This model could reduce systematic errors in measurements of scattering samples by up to 40%.

Effect of Phosphomolybdate Anionic Redox Species on the Performance of Redox Flow Polymer Electrolyte Fuel Cells

Redox flow polymer electrolyte fuel cells (RFFCs) have attracted attention to establish precious metal catalysts–free polymer electrolyte fuel cells (PEFCs) [1]. In RFFCs, an aqueous solution containing redox mediators is supplied to the electrodes for power generation. The aged redox mediators are oxidized or reduced to be the initial state outside the cell, and then the regenerated mediators are fed to the electrodes again. The development of mediators with high redox ability is essential to achieve high performance in RFFCs. Phosphomolybdate anion [PMo12O40]3– (PMA) is known as one of the candidates for an anode redox mediator for RFFCs [2]. Studies adapting PMA aqueous solutions as mediators for RFFCs have reported only properties related to the preparation composition and comprehensive systematic studies on the redox component of heteropolyanions are lacking. For example, PMA undergoes hydrolysis and dimerization in an aqueous solution to form heteropolyanions with different molybdenum coordination numbers spontaneously [3]. When PMA is reduced, it receives N electrons to form reduced–PMA (hereafter abbreviated as PMA–[N], N = I, II, IV) [4]. Thus, it is beneficial to clarify the compositional properties in order to design high–performance anolytes suitable for RFFCs. In this study, the constituent amounts of PMA redox species were semi–quantitatively determined by 31P NMR measurements [5]. Power generation tests have revealed the effect of redox species of heteropolyanion on the performance of RFFCs using the reduced PMA as an anolyte. H3PMo12O40·19.6H2O and H2SO4 were added to ultrapure water to prepare an oxidized 0.1 M PMA–0.5 M H2SO4 aqueous solution. This solution was subjected to a constant current electrolysis (5.00 mA cm–2) to obtain the reduced PMA. A membrane–electrode assembly was prepared using Nafion® membrane as an electrolyte, carbon black as an anode, and Pt/C as a cathode. The pre–reduced PMA aqueous solution bubbled with argon was supplied to the anode by a liquid feed pump. Humidified oxygen (relative humidity; 100%) was supplied to the cathode. Current–voltage (I–V) measurements and galvanostatic operation tests (5.00 mA cm–2) were performed using this single cell at 80 ºC. The 31P NMR spectra of PMA aqueous solutions were measured using a 0.1 M phosphonoacetic acid (C2H5O5P)–D2O as an internal standard. As a result, the molar percentages of PMA–[N] species changed during the galvanostatic electrolysis reduction and the current passage test. The power density improved from 0.43 mW cm–2 to 3.52 mW cm–2 by increasing the molar percentages of the PMA–[N] in the aqueous solution. R. Singh, A. A. Shah, A. Potter, B. Clarkson, A. Creeth, C. Downs, F. C. Walsh, J. Power Sources, 201 (2012) 159–163.W. Wu, W. Liu, W. Mu, Y. Deng, J. Power Sources, 318 (2016) 86–92.R. I. Maksimovskaya, Polyhedron, 65 (2013) 54–59.M. Sadakane, E. Steckhan, Chem. Rev., 98 (1998) 219–237.S. Naruse, H. Muroyama, T. Matsui, K. Eguchi, J. Power Sources, 586 (2023) 233653.

Mechanism Analysis of Solution Li Pre-Doping Technique Toward Si-Based Anodes for Next-Generation Batteries

In recent years, Li metal anode has attracted much attention to increase the energy density for next-generation batteries. However, there are still some problems to be solved such as extra electrolyte decomposition and Li dendrite deposition. Therefore, Si is expected as a promising alternative to Li especially for suppression of the Li dendrite. However, Li pre-doping toward Si anode is necessary because some of cathode materials for next-generation batteries such as Li-S and Li-O2 do not contain Li. Therefore, the Li pre-doping technique is a quite important for Si-based anodes. We have also researched a Li pre-doping technique using Li-naphthalenide (Li-NTL) solutions and reported that the pre-doped capacities depended on the kinds of solvents [1] and Li+ concentration of the Li-NTL solution. In this study, we investigated the mechanism from the viewpoint from kinds of the generated NTL anions by the solvents and discussed on the relationship among them, equilibrium potential of the Li-NTL solutions and the solvation structure including NTL anions and Li+. Si electrode was prepared by coating the slurry of Si powder (f 40-50 nm), Ketjen Black conductive agent, and polyimide binder in a mass ratio of 80: 5: 15. Li-NTL pre-doping solutions were prepared with 5.0 mL of 2-methyltetrahydrofuran (MeTHF), monoglyme (G1), diglyme (G2) or triglyme (G3) solvents, 2.5 mmol naphthalene, and “saturated” Li. Moreover, extra Li foil immersing in the Li-NTL solution was also used during the Li pre-doping toward the Si anode. The equilibrium potentials of the Li-NTL solutions were measured up to 12 h. The amount of generated radical monoanion NTL· - and dianion NTL2 -was evaluated by UV-Vis spectra for the Li-NTL solutions and the solvation structures was also analyzed by a DFT calculation. Fig. 1 shows a change in the equilibrium potentials for the Li-NTL solutions with different solvents. The order of magnitude by the solvents was MeTHF < G1< G3 < G2, which is a good agreement with the pre-doped capacities toward the Si anode expect for the influence of some reduction decomposition of G1 and G2 on the surface of Li alloyed Si anode. Fig. 2 shows the UV-Vis spectra of Li-NTL solutions using different solvents. For the MeTHF solvent, a spectrum derived from NTL2- dianion was clearly appeared at 540 nm, which leads to lowering the equilibrium potential of the Li-NTL solution. From this point, G1 also exhibited the NTL2- dianion signal together with radical monoanion NTL· - at 320 nm. The other glyme solvents exhibited only smaller monoanion signal than that for the G1. DFT calculation also supported the ease to form the dianion for the MeTHF solvent from the solvation structure including NTL2- dianion and Li+. The detail mechanism and the effect of Li+ concentration in the Li-NTL solutions on the relationship between the solvation structure and equilibrium potential will be also discussed in the meeting.

Solar-optical and thermal behavior of photochromic glazing: Small-scale testing under real sky conditions

The poor performance of conventional building glazing, which is usually responsible for large climatization needs and glare problems, has been promoting the development of innovative smart glazing technologies with an improved performance. Photochromic glazing, a type of smart glazing, exhibits a dynamic behavior by darkening/bleaching in reaction to the presence/absence of solar radiation. The aim of this study is to evaluate the thermal and solar-optical behavior of a photochromic filmed clear glazing, against the same glazing without film, through experimental tests. The transmittance and reflectance spectra of the glazing solutions were initially measured with a spectrophotometer. Then two small-scale models were used to assess the behavior of the glazing solutions under real sky conditions (clear and overcast). The thermal behavior was assessed through air and surface temperature measurements. The solar-optical behavior was investigated through solar radiation and illuminance measurements, which were also used to compute the solar and visible transmittance of the glazing systems, respectively. The dynamic behavior of the photochromic film resulted on a reduction of 14 % of the interior temperature. Interior illuminance and irradiance levels were significantly reduced with the film, corresponding to 10–50 % and 15–35 % visible and solar transmittance values of the photochromic glazing, respectively.

MICROCONTROLLER MANAGEMENT SYSTEM OF MANIPULATOR MANAGE

Currently, most manipulators are driven by a DC or AC motor. The encoder is used as a speed positioning and feedback device in the manipulator control system.The spectrum of available solutions in the field of microcontroller control systems of manipulators is considered in the article. The circuit of the controller board has been developed to control the transfer of the manipulator manga.The analysis of the element base included in the composition of the control board has been performed. The manipulators used for the automation of biochemical analysis allow to improve the quality of the conducted analysis and the repeatability of the robot's work. Also, due to continuous performance of the work, it creates conditions to increase productivity as a whole. Keywords: manipulation, robot, microcontroller, manipulator, transmission.

Binding of Glutamic Acid to Silver and Gold Nanoparticles Investigated by Surface-Enhanced Raman Spectroscopy.

Glutamate is the most important excitatory neurotransmitter, which is relevant for the study of several diseases such as amyotrophic lateral sclerosis and Alzheimer. It is the form L-glutamic acid (Glu) takes at physiologically relevant pHs. The surface-enhanced Raman spectra of Glu obtained at pH values ranging from 3.3 to 12 are collected in the presence of silver and gold colloids and on solid substrates. The observed bands are compared with the positions of calculated normal modes for free neutral glutamic acid, glutamic acid monohydrate, glutamic acid bound to gold and silver atoms, and sodium glutamate. Although gold atoms prefer to bind to the NH2 group as compared to carbonyl groups, silver atoms prefer binding to hydroxyl groups more than binding to the amino group. SERS spectra of glutamic acid solutions with a pH value of 12, in which both carboxylic groups are deprotonated, indicate a complexation of the glutamic acid dianion with the sodium cation, which was introduced into the solution to adjust the pH value. Further research towards an optimal substrate is needed.

Optical solitons for the concatenation model with differential group delay having multiplicative white noise by F–expansion approach

This study examines optical soliton solutions for the concatenation model, which includes differential group delay and white noise in both components. Through the F–expansion integration algorithm, an extensive spectrum of soliton solutions was found. It has been confirmed that white noise affects the phase of solitons along both components.

Biogenic silver nanoparticles synthesized using bracken fern inhibits cell proliferation in HCT-15 cells through induction of apoptosis pathway and overexpression of heat shock proteins

BackgroundIn recent years, biosynthesized nanoparticles has shown a promise as alternative avenue for improving the effectiveness of conventional chemotherapy. Despite, there is a significant gap in existing literature concerning the comprehensive study of biogenic silver nanoparticles derived from terrestrial fern species and their potential effects on cancer cells. This study is aiming to investigate effects of biogenic silver nanoparticles synthesized using aqueous extract of bracken fern Pteridium revolutum on inhibiting cell proliferation and inducing apoptosis in HCT-15 cells. MethodsBiogenic silver nanoparticles synthesized using aqueous extract of Pteridum revolutum followed by their characterization (UV–Visible spectroscopy, TEM, XRD and FTIR). The impact on cell proliferation of HCT-15 cells was assessed by MTT assay while induction of apoptosis was demonstrated via DNA fragmentation, caspase-3 assay, cell cycle arrest, FITC V- Annexin assay and evaluation of expression of apoptotic genes using real time PCR and western blotting techniques. ResultsResults of UV–Vis spectrum of colloidal solution of CW-AgNPs showed surface plasmon resonance peak at 430 nm. TEM and XRD results confirmed synthesis of spherical shaped, 20–40 nm sized nanoparticles. The results elucidate cytotoxic effect of PR-AgNPs against HCT-15 cells in time and dose dependent manner with IC50 observed at 5.79 ± 0.58 µg /mL after 24 h of exposure. Furthermore, PR-AgNPs induce significant alterations in cellular morphology, elevate DNA DNA fragmentation and enhance expression of p53 and caspase-3 in HCT10 cells. ConclusionThe findings from this study address the noteworthy antiproliferative effects of PR-AgNPs in cancer cells primarily mediated through activation of intrinsic apoptosis pathway by inducing p53 and caspase-3 genes.

In-line monitoring of bioreactor by Raman spectroscopy: Direct use of a standard-based model through cell-scattering correction

Raman spectroscopy and machine learning have become popular in in-line monitoring of bioreactors. However, traditional modeling processes typically entail extensive fermentation batches to collect learning datasets, which are significantly time–consuming and laborious. In addition, these models are limited to configurations with the same conditions as the training batches. The present work proposes a reproducible and adaptable modeling approach by combining standard spectra as a training dataset, with a simple means of correcting for cell scattering. Alcoholic fermentation by Saccharomyces cerevisiae is used as a benchmark. Initially, a partial least squares (PLS) regression model was developed based on the spectra of pure solutions of glucose and ethanol. Then, a mathematical expression was defined to estimate yeast concentration, allowing the correction of Raman intensity attenuated by cell scattering. The corrected spectra demonstrate close alignment with reference spectra in both shape and intensity. Validation of the methodology was conducted across numerous batches and one fed–batch bioreactor. As a result, the developed method enables the simultaneous monitoring of glucose, ethanol, and yeast concentrations, effectively addressing the challenge of implementing an independent standards based PLS model to manage the intricate compositional dynamics in bio–processes. The conclusion underscores the effectiveness of the proposed method and offers new prospects in biotechnological industries.

Novel Thiourea Ligands—Synthesis, Characterization and Preliminary Study on Their Coordination Abilities

Two series of polydentate N,O,S-ligands containing thiourea fragments attached to a p-cresol scaffold, unsymmetrical mono-acylated bis-amines and symmetrical bis-thioureas, are obtained by common experiments. It is observed that the reaction output is strongly dependent on both bis-amine and thiocarbamic chloride substituents. The products are characterized by 1D and 2D NMR spectra in solution and by single crystal XRD. A preliminary study on the coordination abilities of selected products is performed by ITC at around neutral media.

A highly sensitive β-AKBA-Ag-based fluorescent “turn off” chemosensor for rapid detection of abamectin in tomatoes

Abstract This study presents the synthesis of a sensitive AKBA-Based fluorescent “Turn off” chemosensor for rapid detection of abamectin residues in tomatoes. Silver nanoparticles were synthesized by using 3-O-acetyl-11-keto-β-boswellic acid (β-AKBA) by chemical reduction method. The characterization of AKBA-AgNPs was performed by UV–vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The average particle size of NPs was found to be 46.2 ± 2 nm with lumps of macro-sized particles. TEM data further revealed that nanoparticles were polydispersed and spherical in shape and also show good stability at high temperatures and pH. The biosensing properties of nanoparticles were studied for the detection of abamectin residues in tomato samples. Abamectin a natural product derived from the bacterium Streptomyces avermitilis is effective against a wide range of pests. In sensing protocol 67 organic tomato samples were segregated into 34 (safe group, without a spray of abamectin) and 33 samples (as an unsafe group, sprayed with abamectin insecticide solution). Emission spectra of these sample solutions were measured in the wavelength range of 450–530 nm, excitation wavelength was fixed at 488 nm. The effect of minor wavelength variation for the discrimination and classification of the two groups was investigated by applying two chemometric methods including partial least square discriminant analysis and principal component analysis with projection. The mechanism of its interaction between the AKBA-Ag NPs and abamectin residue was also established through UV/visible, FTIR, and TEM microscopy. This newly synthesized nanoparticle was found to have excellent stability at variables, i.e., temperature, storage period, salt concentration, and pH. Therefore, the synthesized Ag NPs are potential candidates for biosensing applications against abamectin.

Conformational Composition of Ethylene Glycol in Aqueous Solutions and on Metal Substrates

In this work, we studied the Raman spectra of ethylene glycol (EG) and its aqueous solutions, as well as the spectra of ethylene glycol solutions deposited on a metal substrate prepared by laser ablation. Scattering was excited by laser radiation with wavelengths of 532 nm and 785 nm. It was found that the Raman spectra of EG are similar to the spectra of aqueous solutions of EG and to the spectra of EG solutions on a metal substrate, which may indicate the stability of the conformational composition of EG upon dissolution and drying on a structured metal substrate.

Versatile Molecular Structure Strategy Toward Highly Efficient Single‐Component White Organic Light–Emitting Diodes

AbstractLuminophores' dual emission (DE) properties hold great potential for realizing single‐component white organic light–emitting diodes (WOLEDs). This study illustrates that the unique and vibrant DE phenomena with different luminous mechanisms can be formed through simple modulation of molecular structures. Four target luminophores, namely 2‐TPE‐PPI, 2‐TPE‐PI, 2‐TPE‐An‐PPI, and 2‐TPE‐An‐PI, capable of DE under different conditions, are intentionally designed and successfully synthesized. Owing to the inherent flexibility of the minor molecular backbone and minor steric hindrance, 2‐TPE‐PPI and 2‐TPE‐PI exhibit DE spectra in dilute solutions with different solvent polarities. The intrinsic cause of the DE phenomenon in 2‐TPE‐An‐PPI and 2‐TPE‐An‐PI arises from the localized distribution of frontier molecular orbits resulting from the presence of an anthracene unit and the formation of an exciter group through intermolecular interactions involving anthracene. Remarkably, single‐emissive‐layer WOLEDs based on 2‐TPE‐An‐PPI and 2‐TPE‐An‐PI demonstrate stable white emission with CIE coordinates at (0.33, 0.39) and (0.30, 0.39), respectively, closely approaching the CIE coordinates of standard white light. Moreover, they maintain stable EL spectra from 4 to 10 V, an exceptional attribute rarely observed in many white light devices.