Log in

Relevant bibliographies by topics / Solvent emission / Journal articles

To see the other types of publications on this topic, follow the link: Solvent emission.

Journal articles on the topic 'Solvent emission'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Solvent emission.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Wetzler, Diana E., Carlos Chesta, Roberto Fernández-Prini, and Pedro F. Aramendía. "Dynamic solvatochromism in solvent mixtures." Pure and Applied Chemistry 73, no. 3 (2001): 405–9. http://dx.doi.org/10.1351/pac200173030405.

Full text

Abstract:

Solvatochromism and thermochromism of 4-aminophthalimide and 4-amino-N-methylphthalimide were studied by absorption and steady-state and time-resolved emission spectroscopy in solvent mixtures of tolueneethanol and tolueneacetonitrile at different temperatures. Emission spectra shift to the red upon addition of a polar solvent (PS) to toluene. Solvent mixtures show a much greater thermochromic shift to the blue in emission than the neat solvents. This is explained by the decrease in temperature of the exothermic association of the polar solvent to the excited state. Emission spectra are time

APA, Harvard, Vancouver, ISO, and other styles

2

Hoyle, Charles E., Isaac B. Rufus, and Himanshu Shah. "Solvent effect on the photophysics of bisphenol-A-based polycarbonate and diphenylcarbonate." Canadian Journal of Chemistry 73, no. 11 (1995): 2062–68. http://dx.doi.org/10.1139/v95-254.

Full text

Abstract:

Polycarbonate and diphenylcarbonate exhibit an anomalous fluorescence emission with peak maximum around 350 nm in polar solvents that may be attributed to the association of diarylcarbonate moieties in a polar solvent cage. The red-shifted emission is attributed to intermolecular interactions in polar solvents and intramolecular interactions in polycarbonate. The photophysical behavior of polycarbonate and diphenylcarbonate is different from that of 1,3-diphenylpropane where a red-shifted emission is due to excimers formed by phenyl groups separated by three carbon atoms and is independent of

APA, Harvard, Vancouver, ISO, and other styles

3

Pithan, Phil M., David Decker, Manlio Sutero Sardo, Giampietro Viola, and Heiko Ihmels. "Synthesis and fluorosolvatochromism of 3-arylnaphtho[1,2-b]quinolizinium derivatives." Beilstein Journal of Organic Chemistry 12 (May 2, 2016): 854–62. http://dx.doi.org/10.3762/bjoc.12.84.

Full text

Abstract:

Cationic biaryl derivatives were synthesized by Suzuki–Miyaura coupling of 3-bromonaphtho[1,2-b]quinolizinium bromide with arylboronic acids. The resulting cationic biaryl derivatives exhibit pronounced fluorosolvatochromic properties. First photophysical studies in different solvents showed that the emission energy of the biaryl derivatives decreases with increasing solvent polarity. This red-shifted emission in polar solvents is explained by a charge shift (CS) in the excited state and subsequent solvent relaxation. Furthermore, the polarity of protic polar and aprotic polar solvents affects

APA, Harvard, Vancouver, ISO, and other styles

4

Chevreux, S., C. Allain, L. Wilbraham, et al. "Solvent tuned single molecule dual emission in protic solvents: effect of polarity and H-bonding." Faraday Discussions 185 (2015): 285–97. http://dx.doi.org/10.1039/c5fd00054h.

Full text

Abstract:

Phen-PENMe2 has recently been proposed as a promising new molecule displaying solvent-tuned dual emission, highlighting an original and newly-described charge transfer model. The study of the photophysical behaviour of this molecule was extended to include protic solvents. The effects of polarity and hydrogen bonding lead to an even more evident dual emission associated with a large multi-emission band in some solvents like methanol, highlighting Phen-PENMe2 as a promising candidate for white light emission.

APA, Harvard, Vancouver, ISO, and other styles

5

Waris, Riaz, Michael A. Rembert, David M. Sellers, et al. "Polycyclic Aromatic Hydrocarbon Solute Probes: Effect of Solvent Polarity on the Ovalene and Benzo[ghi]perylene Fluorescence Emission Fine Structures." Applied Spectroscopy 42, no. 8 (1988): 1525–31. http://dx.doi.org/10.1366/0003702884429805.

Full text

Abstract:

Fluorescence properties of benzo[ghi]perylene (BPe) and ovalene (Ov) dissolved in 25 solvents of varying polarity are reported. Measurements indicate that emission intensities depend on solvent polarity. The BPe and Ov solvent polarity scales are defined as the ratio of the fluorescence emission intensities of bands I and III of the vibronic spectra. Benzo[ghi]perylene and ovalene solute probes enable fluorescence measurements to be made in spectral regions less prone to solvent inner filtering and other artifacts which have hampered the use of pyrene (Py) as a polarity probe molecule.

APA, Harvard, Vancouver, ISO, and other styles

6

Meza, O., L. A. Diaz-Torres, P. Salas, et al. "Dynamics of the Green and Red Upconversion Emissions inYb3+-Er3+-CodopedY2O3Nanorods." Journal of Nanomaterials 2010 (2010): 1–8. http://dx.doi.org/10.1155/2010/491982.

Full text

Abstract:

Efficient green and red upconversion emission inY2O3:Yb3+,Er3+nanorods under 978 nm radiation excitation is achieved. Experimental effective lifetimes, luminescent emissions, and nanorod sizes depend strongly on the solvent ratios used during the synthesis. A microscopic nonradiative energy transfer model is used to approach the dynamics of the green, red, and infrared emissions. The excellent agreement between simulated and experimental decay suggests that the energy transfer mechanisms responsible of the visible emission depend on the solvent ratio.

APA, Harvard, Vancouver, ISO, and other styles

7

de Angelis, Roberta, Mauro Casalboni, Liliana D’Amico, et al. "Vapour Sensitivity of InP Surface Quantum Dots." Key Engineering Materials 605 (April 2014): 177–80. http://dx.doi.org/10.4028/www.scientific.net/kem.605.177.

Full text

Abstract:

We studied the effect of solvent vapours on the photoluminescent emission of self-assembled InP surface quantum dots (SQDs). Their room temperature near infrared emission undergoes a fully reversible intensity enhancement when the dots were exposed to vapours of polar solvents since polar molecules are likely to be adsorbed onto intrinsic surface states and thus reducing non radiative surface recombination. The shape and position of the emission band does not change. The observed effect is dependent on solvent type and concentration with linear law over a limited concentration range.

APA, Harvard, Vancouver, ISO, and other styles

8

Cho, Yang-Jin, So-Yoen Kim, Minji Cho та ін. "Aggregation-induced emission of diarylamino-π-carborane triads: effects of charge transfer and π-conjugation". Physical Chemistry Chemical Physics 18, № 14 (2016): 9702–8. http://dx.doi.org/10.1039/c5cp07883k.

Full text

Abstract:

Carborane-based donor–π–acceptor triads bearing triarylamine moieties showed dual emissions, which were assigned as a charge-transfer emission and an aggregation induced emission. The emission properties were affected by two main factors: solvent polarity and solubility.

APA, Harvard, Vancouver, ISO, and other styles

9

Mo, Ziwei, Ru Cui, Bin Yuan, et al. "A mass-balance-based emission inventory of non-methane volatile organic compounds (NMVOCs) for solvent use in China." Atmospheric Chemistry and Physics 21, no. 17 (2021): 13655–66. http://dx.doi.org/10.5194/acp-21-13655-2021.

Full text

Abstract:

Abstract. Non-methane volatile organic compounds (NMVOCs) are important precursors of ozone (O3) and secondary organic aerosol (SOA), which play key roles in tropospheric chemistry. A huge amount of NMVOC emissions from solvent use are complicated by a wide spectrum of sources and species. This work presents a long-term NMVOC emission inventory of solvent use during 2000–2017 in China. Based on a mass (material) balance method, NMVOC emissions were estimated for six categories, including coatings, adhesives, inks, pesticides, cleaners, and personal care products. The results show that NMVOC em

APA, Harvard, Vancouver, ISO, and other styles

10

Ahmed, Asmaa N. "A study of the solvent effect on the low temperature spectra of benzoanthracene molecules." Iraqi Journal of Physics (IJP) 12, no. 24 (2019): 1–9. http://dx.doi.org/10.30723/ijp.v12i24.315.

Full text

Abstract:

been taken at room temperature down to liquid nitrogen temperature (77K). Polar and nonpolar solvents have been used to study the solvent effect on the absorption and fluorescence spectra of solute molecules. Some of the spectroscopic parameters have been determined as functions of solvent polarity and temperature. The results indicate that the band width FWHM increases with increasing the solvent polarity and temperature, while the peak emission cross section decreases with increasing of solvent polarity and decreases with increasing the temperatures. Clear vibrational structure spectra of be

APA, Harvard, Vancouver, ISO, and other styles

11

Raksajati, Anggit, Minh Ho, and Dianne Wiley. "Solvent Development for Post-Combustion CO2 Capture: Recent Development and Opportunities." MATEC Web of Conferences 156 (2018): 03015. http://dx.doi.org/10.1051/matecconf/201815603015.

Full text

Abstract:

Chemical absorption is widely regarded as the most promising technology for post-combustion CO2 capture from large industrial emission sources with CO2 separation from natural gas using aqueous amine solvent system having been applied since the 1930s. The use of monoethanolamine (MEA) in CO2 absorption system possesses several drawbacks, such as high regeneration energy, high solvent loss, and high corrosion tendency. Various solvents have been developed for post-combustion CO2 capture application including the development of aqueous solvents and phase-change solvents. Some of these alternate

APA, Harvard, Vancouver, ISO, and other styles

12

Li, Yong, Dung D. Nguyen, Kuldeep Shetye, and Zhonghua Peng. "Synthesis and Optical Properties of Triphenylene-Based Donor-Donor and Donor-Acceptor Conjugated Polymers: A Comparative Study." International Journal of Polymer Science 2020 (November 17, 2020): 1–12. http://dx.doi.org/10.1155/2020/8866816.

Full text

Abstract:

Two new conjugated polymers (P1 and P2), containing a bithiophene donor unit coupled with either a triphenylene donor unit or an imide-functionalized triphenylene acceptor unit in the backbone, have been synthesized, structurally characterized, and comparatively studied by using 1H NMR, FT-IR, gel permeation chromatography, differential scanning calorimetry, cyclic voltammetry, ultraviolet-visible absorption, and fluorescence spectroscopy. Both polymers are amorphous in nature and thermally stable up to 450°C. The inclusion of the imide functionalization in the triphenylene unit significantly

APA, Harvard, Vancouver, ISO, and other styles

13

Tucker, Sheryl A., Jason M. Griffin, William E. Acree, Maximilian Zander, and Reginald H. Mitchell. "Spectroscopic Properties of Polycyclic Aromatic Compounds. Part IV: Effect of Solvent Polarity and Nitromethane on the Fluorescence Emission Behavior of Select Bipolycyclic Aromatic Hydrocarbons." Applied Spectroscopy 48, no. 4 (1994): 458–64. http://dx.doi.org/10.1366/000370294775268965.

Full text

Abstract:

Fluorescence emission behavior is reported for 1,1′-binaphthalene, 2,2′-binaphthalene, 9,9′-bianthracene, 9,9′-biphenanthrene, 1,1′-methylene-bisnaphthalene, and 1,1′,2,2′-tetrahydro-5,5′-biacenaphthylene dissolved in organic nonelectrolyte solvents of varying polarity, refractive index, and dielectric constant. Fluorescence measurements are used to classify the six bipolycyclic aromatic hydrocarbon (bi-PAH) solutes as either solvatochromic probe or nonprobe molecules, depending upon whether measured fluorescence properties vary with solvent nature. Of the bi-PAHs studied, only 9,9′-bianthrace

APA, Harvard, Vancouver, ISO, and other styles

14

Li, Qi, Yuezhou Liu, Peiren Liu, Liqing Shangguan, Huangtianzhi Zhu та Bingbing Shi. "Solvent-controlled assembly of pillar[5]arene-based supramolecular networks via π–π interactions for white light modulation". Organic Chemistry Frontiers 7, № 2 (2020): 399–404. http://dx.doi.org/10.1039/c9qo01383k.

Full text

Abstract:

A supramolecular network based on pyrene-containing pillar[5]arene and a red emissive Eu(iii) complex was constructed, whose assembly and emission can be controlled by solvent polarity, eventually achieving white light emission.

APA, Harvard, Vancouver, ISO, and other styles

15

Tucker, Sheryl A., William E. Acree, John C. Fetzer, and Reginald H. Mitchell. "Polycyclic Aromatic Hydrocarbon Solute Probes. Part X: Evaluation of Select Hydrogenated Pyrene, Benzo[ghi]perylene, and Naphthacene Derivatives as Possible Solvent Polarity Probes." Applied Spectroscopy 47, no. 7 (1993): 1040–45. http://dx.doi.org/10.1366/0003702934415200.

Full text

Abstract:

Fluorescence emission spectra are reported for 3,4,5-trihydrobenzo[cd]pyrene, 3,4-dihydrobenzo[ghi]perylene, 5,6,7,8,9,10-hexahydrobenzo[ghi]perylene, trans-10b,10c-dihydro-10b,10c-dimethylpyrene, trans-12b,12c-dihydro-12b,12c-dimethylbenzo[a]pyrene, and trans-14b,14c-dihydro-14b,14c-dimethylnaphtho[2,1,8-qra]naphthacene dissolved in organic nonelectrolyte solvents of varying polarity. Dihydrobenzo|ghi]perylene was found to exhibit probe character, as evidenced by a systematic variation in emission intensity ratio with solvent polarity. It has a dynamic range of 0.98 and a high fluorescence qu

APA, Harvard, Vancouver, ISO, and other styles

16

Al Mohaimeed, Rawabi M., Anees A. Ansari, and Abdullah Aldwayyan. "The Role of Solvent Environment on the Optical Behavior of Chemically Synthesized Silicon Nanoparticles." Journal of Spectroscopy 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/6870645.

Full text

Abstract:

Silicon nanoparticles (Si-NPs) were prepared by solution-based chemical etching method. Optical characteristics of the as-prepared Si-NPs were investigated in different polar and nonpolar organic solvents. The emission and absorption properties of Si-NPs were tuned by altering the environment (solvents). The variation in absorption coefficient was observed because of the solvent interaction nature of Si-NPs. Si-NPs in polar aprotic and nonpolar solvents manifested good luminescence under UV excitation. PL intensities were observed to be depending on etched cross-section area on wafer surface.

APA, Harvard, Vancouver, ISO, and other styles

17

Rowbotham, J. "Solvent emission regulation – compliance made easy." Transactions of the IMF 85, no. 4 (2007): 180–83. http://dx.doi.org/10.1179/174591907x216486.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Bajpai, Alankriti, Arindam Mukhopadhyay, Manchugondanahalli Shivakumar Krishna, Savitha Govardhan, and Jarugu Narasimha Moorthy. "A fluorescent paramagnetic Mn metal–organic framework based on semi-rigid pyrene tetracarboxylic acid: sensing of solvent polarity and explosive nitroaromatics." IUCrJ 2, no. 5 (2015): 552–62. http://dx.doi.org/10.1107/s2052252515012506.

Full text

Abstract:

An Mn metal–organic framework (Mn-MOF), Mn-L, based on a pyrene-tetraacid linker (H4L), displays a respectable fluorescence quantum yield of 8.3% in spite of the presence of the paramagnetic metal ions, due presumably to fixation of the metal ions in geometries that do not allow complete energy/charge-transfer quenching. Remarkably, the porous Mn-LMOF with ∼25% solvent-accessible volume exhibits a heretofore unprecedented solvent-dependent fluorescence emission maximum, permitting its use as a probe of solvent polarity; the emission maxima in different solvents correlate excellently with Reich

APA, Harvard, Vancouver, ISO, and other styles

19

Li, Meng, Qiang Zhang, Bo Zheng, et al. "Persistent growth of anthropogenic non-methane volatile organic compound (NMVOC) emissions in China during 1990–2017: drivers, speciation and ozone formation potential." Atmospheric Chemistry and Physics 19, no. 13 (2019): 8897–913. http://dx.doi.org/10.5194/acp-19-8897-2019.

Full text

Abstract:

Abstract. Non-methane volatile organic compounds (NMVOCs) are important ozone and secondary organic aerosol precursors and play important roles in tropospheric chemistry. In this work, we estimated the total and speciated NMVOC emissions from China's anthropogenic sources during 1990–2017 by using a bottom-up emission inventory framework and investigated the main drivers behind the trends. We found that anthropogenic NMVOC emissions in China have been increasing continuously since 1990 due to the dramatic growth in activity rates and absence of effective control measures. We estimated that ant

APA, Harvard, Vancouver, ISO, and other styles

20

Gong, Jin Dong, Wei Zhang, Ping Shen, Ming Xun Yan, and Chang Ying Yang. "Photo-Induced Fluorescence Enhancement of BOPIM–dma in Moderate Polar Solvents." Applied Mechanics and Materials 488-489 (January 2014): 193–96. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.193.

Full text

Abstract:

The photo-induced fluorescence enhancement for a BOPIM derivate, which was found weak or no fluorescence in solvents due to twisted intramolecular charge transfer (TICT) was investigated. The quenching process because of TICT state is substantially removed and fluorescence emission intensity increased remarkably, induced by UV-irradiation. This phenomenon could only found in moderate polar solvent, such as CHCl3, THF and 1, 4-dioxane (DIOX), but not in more polarity solvent, such as CH3CN, CH3OH. It is indicated that the transformation from TICT to ICT state take place easily in moderate polar

APA, Harvard, Vancouver, ISO, and other styles

21

Sheng, Yinghong, and Jerzy Leszczynski. "Theoretical Study of the Substituent and Solvent Effects on the Molecular Structures, Absorption and Emission Spectra of Open-Form Spiropyrans." Collection of Czechoslovak Chemical Communications 69, no. 1 (2004): 47–62. http://dx.doi.org/10.1135/cccc20040047.

Full text

Abstract:

The effects of substituents and solvents on the molecular structures, excitation energies and emission energies of a series of donor-acceptor substituted spiropyrans were investigated using the density functional methods. Different donor-acceptor pairs lead to alternations of the molecular structures. A relationship between the strengths of donor-acceptor pairs and the structural parameter BLA (bond length alternation) was examined and discussed. The impact on geometrical parameters induced by the solvents is more significant than that caused by the substituents, as indicated by the larger BLA

APA, Harvard, Vancouver, ISO, and other styles

22

Nandy, Ritesh, and Sethuraman Sankararaman. "Donor-acceptor substituted phenylethynyltriphenylenes – excited state intramolecular charge transfer, solvatochromic absorption and fluorescence emission." Beilstein Journal of Organic Chemistry 6 (October 18, 2010): 992–1001. http://dx.doi.org/10.3762/bjoc.6.112.

Full text

Abstract:

Several 2-(phenylethynyl)triphenylene derivatives bearing electron donor and acceptor substituents on the phenyl rings have been synthesized. The absorption and fluorescence emission properties of these molecules have been studied in solvents of different polarity. For a given derivative, solvent polarity had minimal effect on the absorption maxima. However, for a given solvent the absorption maxima red shifted with increasing conjugation of the substituent. The fluorescence emission of these derivatives was very sensitive to solvent polarity. In the presence of strongly electron withdrawing (

APA, Harvard, Vancouver, ISO, and other styles

23

Duan, Jun Hong, Zhen Ya Xu, and Hao Feng. "The Growth and Optical Properties of CdS Nanorods via Solvent-Thermal Route." Advanced Materials Research 652-654 (January 2013): 647–53. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.647.

Full text

Abstract:

CdS nanocrystals were synthesized by a solvent-thermal method in ethylenediamine at different temperature and time. The samples were investigated by XRD, TEM, Uv-vis absorption and PL spectroscopy. The solvent-thermal temperature at 200 °C is an optimal reaction temperature for preparing CdS nanorods with high crystallinity. The PL spectra exhibited two typical emissions: near band edge emission (centered at ~520nm) and defect emission (a broad peak in the range of 550-750nm). The defect emission decreased gradually and disappeared finally with the reaction time increasing from 1 to 12h, but t

APA, Harvard, Vancouver, ISO, and other styles

24

Akterian, Stepan. "Evaluating the vapour evaporation from the surface of pure organic solvents and their mixtures." Food Science and Applied Biotechnology 3, no. 1 (2020): 77. http://dx.doi.org/10.30721/fsab2020.v3.i1.76.

Full text

Abstract:

Some perfumery and cosmetic products represent mixtures and they include large parts of solvents as ethanol, water, acetone and isopropyl alcohol. Solvents as pure hexane and ethanol-water mixtures are used in the solvent extraction of oil-bearing plant materials and herbs. The goal of this study was the emissions of volatile solvents released during above pointed productions to be evaluated. It was found that the specific evaporation rate varies from 1.2 kg/(m2.h) (for pure methoxy-propanol) to 66 kg/(m2.h) (for three-component mixture including acetone). The evaporation rate is higher for

APA, Harvard, Vancouver, ISO, and other styles

25

Zhu, Yan Jun, Liang Luo, Ling Ling Song, and Xiao Yun Li. "Solvent Mediated Structure Control of Hierarchical CoS Nanostructures." Advanced Materials Research 535-537 (June 2012): 372–75. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.372.

Full text

Abstract:

A facile one-pot hydrothermal synthesis approach has been developed to prepare hierarchical and well-defined cobalt sulfide nanostructures. Different solvents (methanol, ethanol, glycol, propyl alcohol and butyl alcohol) were applied to investigate the influence of solvent on the morphologies evolution procedures. Morphologies such as sphere-, cube-, flake-like cobalt sulfide structures can be obtained, the surface appearance of the cobalt sulfide nanostructure also can be controlled by changing the solvent. The as-prepared products were characterized by Field-emission scanning electron micros

APA, Harvard, Vancouver, ISO, and other styles

26

Wang, M., M. Shao, W. Chen, et al. "Validation of emission inventories by measurements of ambient volatile organic compounds in Beijing, China." Atmospheric Chemistry and Physics Discussions 13, no. 10 (2013): 26933–79. http://dx.doi.org/10.5194/acpd-13-26933-2013.

Full text

Abstract:

Abstract. Understanding the sources of volatile organic compounds (VOCs) is essential for ground-level ozone and secondary organic aerosols (SOA) abatement measures. We made measurements at 28 sites and online observations at an urban site in Beijing from July 2009 to January 2012. From these we determined the spatial and temporal distributions of VOCs, estimated their annual emission strengths based on their emission ratios relative to CO, and quantified the relative contributions of various sources using the chemical mass balance (CMB) model. The results from ambient measurements were compar

APA, Harvard, Vancouver, ISO, and other styles

27

He, Zhuoran, Xuemei Wang, Zhenhao Ling, et al. "Contributions of different anthropogenic volatile organic compound sources to ozone formation at a receptor site in the Pearl River Delta region and its policy implications." Atmospheric Chemistry and Physics 19, no. 13 (2019): 8801–16. http://dx.doi.org/10.5194/acp-19-8801-2019.

Full text

Abstract:

Abstract. Volatile organic compounds (VOCs) are key precursors of photochemical smog. Quantitatively evaluating the contributions of VOC sources to ozone (O3) formation could provide valuable information for emissions control and photochemical pollution abatement. This study analyzed continuous measurements of VOCs during the photochemical season in 2014 at a receptor site (Heshan site, HS) in the Pearl River Delta (PRD) region, where photochemical pollution has been a long-standing issue. The averaged mixing ratio of measured VOCs was 34±3 ppbv, with the largest contribution from alkanes (17±

APA, Harvard, Vancouver, ISO, and other styles

28

Khan, M. Naziruddin, M. A. Majeed Khan, A. S. Al Dwayyan, and J. Puzon Labis. "Comparative Study on Electronic, Emission, Spontaneous Property of Porous Silicon in Different Solvents." Journal of Nanomaterials 2014 (2014): 1–14. http://dx.doi.org/10.1155/2014/682571.

Full text

Abstract:

Luminescent porous silicon (Psi) fabricated by simple chemical etching technique in different organic solvents was studied. By quantifying the silicon wafer piece, optical properties of the Psi in solutions were investigated. Observation shows that no photoluminescence light of Psi in all solvents is emitted. Morphology of Psi in different solvents indicates that the structure and distribution of Psi are differently observed. Particles are uniformly dispersive with the sizes around more or less 5–8 nm. The crystallographic plane and high crystalline nature of Psi is observed by selected area d

APA, Harvard, Vancouver, ISO, and other styles

29

Arshad, Farwa, Ayan Pal, Md Atiur Rahman, Maroof Ali, Javed Alam Khan, and Md Palashuddin Sk. "Insights on the solvatochromic effects in N-doped yellow-orange emissive carbon dots." New Journal of Chemistry 42, no. 24 (2018): 19837–43. http://dx.doi.org/10.1039/c8nj03698e.

Full text

Abstract:

We have demonstrated a rapid and facile synthetic method to prepare N-doped Cdots that has excitation independent-emission in yellow-orange region. The Cdots showed solvatochromic behavior in different solvents due to change in solvent polarity illustrating n → π* transition (edge band).

APA, Harvard, Vancouver, ISO, and other styles

30

Bo, Y., H. Cai, and S. D. Xie. "Spatial and temporal variation of emission inventories for historical anthropogenic NMVOCs in China." Atmospheric Chemistry and Physics Discussions 8, no. 3 (2008): 11519–66. http://dx.doi.org/10.5194/acpd-8-11519-2008.

Full text

Abstract:

Abstract. Multiyear emission inventories of anthropogenic NMVOCs in China for 1980–2005 were compiled based on time-varying statistical data, literature surveyed and model calculated emission factors, and were gridded at a high spatial resolution of 40 km×40 km using the GIS methodology. Chinese NMVOCs emissions had increased by 4.3 times at an annual average rate of 10.7% from 3.92 Tg in 1980 to 16.5 Tg in 2005. Vehicles, biomass burning, industrial processes, fossil fuel combustion, solvent utilization, and storage and transport generated 5.49 Tg, 3.91 Tg, 2.76 Tg, 1.98 Tg, 1.87 Tg, and 0.55

APA, Harvard, Vancouver, ISO, and other styles

31

Wang, M., M. Shao, W. Chen, et al. "A temporally and spatially resolved validation of emission inventories by measurements of ambient volatile organic compounds in Beijing, China." Atmospheric Chemistry and Physics 14, no. 12 (2014): 5871–91. http://dx.doi.org/10.5194/acp-14-5871-2014.

Full text

Abstract:

Abstract. Understanding the sources of volatile organic compounds (VOCs) is essential for ground-level ozone and secondary organic aerosol (SOA) abatement measures. We made VOC measurements at 27 sites and online observations at an urban site in Beijing from July 2009 to January 2012. Based on these measurement data, we determined the spatial and temporal distribution of VOCs, estimated their annual emission strengths based on their emission ratios relative to carbon monoxide (CO), and quantified the relative contributions of various sources using the chemical mass balance (CMB) model. These r

APA, Harvard, Vancouver, ISO, and other styles

32

Bromberg, Avraham, and Christopher S. Foote. "Solvent shift of singlet oxygen emission wavelength." Journal of Physical Chemistry 93, no. 10 (1989): 3968–69. http://dx.doi.org/10.1021/j100347a020.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Minaev, B. F. "Solvent induced emission of molecular 1Δg oxygen". Journal of Molecular Structure: THEOCHEM 183, № 3-4 (1989): 207–14. http://dx.doi.org/10.1016/0166-1280(89)80002-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Kondo, Shin-ichi, Yuka Taguchi, and Yi Bie. "Solvent dependent intramolecular excimer emission of di(1-pyrenyl)silane and di(1-pyrenyl)methane derivatives." RSC Advances 5, no. 8 (2015): 5846–49. http://dx.doi.org/10.1039/c4ra12153h.

Full text

Abstract:

Di(1-pyrenyl)silane and methane derivatives showed unprecedented intramolecular excimer emission in polar organic solvents such as DMSO and the ratio of excimer/monomer emissions strongly depends on the dielectric constants of the solvents.

APA, Harvard, Vancouver, ISO, and other styles

35

Tucker, Sheryl A., William E. Acree, John C. Fetzer, et al. "Spectroscopic Investigation of Fluorescence Quenching Agents. Part III: Effect of Solvent Polarity on the Selectivity of Nitromethane for Discriminating between Alternant versus Nonalternant Polycyclic Aromatic Hydrocarbons." Applied Spectroscopy 47, no. 6 (1993): 715–22. http://dx.doi.org/10.1366/0003702934066875.

Full text

Abstract:

To better assess the applicability of nitromethane as a selective quenching agent for alternant versus nonalternant polycyclic aromatic hydrocarbons in HPLC, TLC, and HPTLC analysis, we measured the effect that it has on the fluorescence emission behavior of 96 different polycyclic aromatic hydrocarbons dissolved in binary toluene/acetonitrile solvent mixtures. Results of these measurements revealed that the “selective quenching” rule is obeyed for the vast majority of PAHs, with the coronene derivatives being the only major exceptions. Fluorescence emission spectra are also reported for benzo

APA, Harvard, Vancouver, ISO, and other styles

36

Renuka, C. G., Anil Kumar, A. G. Pramod, et al. "Photophysical properties of novel fluorescent 1-(3-Hydroxy-benzofuran-2-yl)-benzo[f]chromen-3-one derivative: models for correlation solvent polarity scales." Canadian Journal of Physics 97, no. 5 (2019): 548–57. http://dx.doi.org/10.1139/cjp-2018-0116.

Full text

Abstract:

Photophysical and spectral properties of a new benzofuran-derivative-based fluorescent probe 1-(3-Hydroxy-benzofuran-2-yl)-benzo[f]chromen-3-one (1-HBBC) were considered in various parameters of solvents, making use of UV–Vis absorption and fluorescence emission spectroscopy. The absorption and fluorescence emission peak maxima were observed between 260–349 and 400–485 nm, respectively, prompting Stokes’ shift between 13 993 and 18 495 cm−1. Diverse solvent parameters have been utilized to understand the solvatochromism of 1-HBBC. This information is applied to understand the effects of the so

APA, Harvard, Vancouver, ISO, and other styles

37

Grenci, Susan M., George R. Bird, Brian W. Keelan, and Ahmed H. Zewail. "Practical Broad-Band Tuning of Dye Lasers by Solvent Shifting." Laser Chemistry 6, no. 6 (1986): 361–71. http://dx.doi.org/10.1155/lc.6.361.

Full text

Abstract:

We have operated a dye laser over a broad wavelength range (593.8–667.0 nm) by shifting the dye emission profile with incremental changes of solvent composition. This was accomplished with the laser operating continuously, and only minor adjustment of the laser optics was required. Solvent tuning was facilitated by the critical dependence of the optimum laser wavelength on concentration of the second solvent. Using the known solvent-sensitive laser dye 9-diethylaminobenzo[a]phenoxaz-5-one (DBP), 87% of the tuning range from pure xylenes to pure methanol was covered by cumulative addition of 24

APA, Harvard, Vancouver, ISO, and other styles

38

Tucker, Sheryl A., Hardjanti Darmodjo, William E. Acree, et al. "Polycyclic Aromatic Nitrogen Heterocycles. Part IV: Effect of Solvent Polarity, Solvent Acidity, Nitromethane and 1,2,4-Trimethoxybenzene on the Fluorescence Emission Behavior of Select Monoaza- and Diazaarenes." Applied Spectroscopy 46, no. 11 (1992): 1630–35. http://dx.doi.org/10.1366/0003702924926952.

Full text

Abstract:

Fluorescence emission spectra are reported for naphth[2′l′8′7′: 4,10,5]anthra[l,9,8cdef]cinnoline, benzo[lmn][3,8]phenanthroline (also called 2,7-diazapyrene), benz[4,10]anthra[l,9,8cdef]cinnoline, naphtho[8,1,2hij]pyreno[9,10,ldef]phthalazine, acenaphtho[l,2b]pyridine, benzo[a]phenazine, indeno[l,2,3ij][2,7]naphthyridine, and indeno-[l,2,3ij]isoquinoline dissolved in organic nonelectrolyte solvents of varying polarity and acidity. Results of these measurements indicate that naphth[2′,1′,8′,7′:4,10,5]anthra[l,9,8cdef]cinnoline exhibits some signs of probe character as evidenced by changing emi

APA, Harvard, Vancouver, ISO, and other styles

39

Han, Meng, Jing Geng, Gen Wang, et al. "Source Apportionment of VOCs in Urban Tianjin, China." Advanced Materials Research 955-959 (June 2014): 1326–29. http://dx.doi.org/10.4028/www.scientific.net/amr.955-959.1326.

Full text

Abstract:

facing the problem of VOCs pollution, VOCs concentrations in urban Tianjin have been measured to identify their possible sources. Using positive matrix factorization, seven VOC sources are identified in urban Tianjin according to the factor loadings of various VOCs, including: 1) motor vehicle exhaust; 2) gasoline evaporation; 3) internal engine combustion emission; 4) diesel emission; 5) solvent usage; 6) industrial emission; and 7) biogenic emission. The identified sources of VOCs are significantly related to vehicular activities, which specifically contribute 60% to VOCs loadings in urban T

APA, Harvard, Vancouver, ISO, and other styles

40

Liu, Manman, and Jian Zhang. "Synthesis and fluorescence of pyrazolines substituted with pyrimidine and ferrocene subunits." Heterocyclic Communications 22, no. 1 (2016): 31–35. http://dx.doi.org/10.1515/hc-2015-0129.

Full text

Abstract:

Abstract1,3,5-Trisubstituted 2-pyrazolines were synthesized by the reaction of chalcones with hydrazine in hot ethanol. Their structures were elucidated by 1H NMR, 13C NMR, IR, MS and elemental analysis. The fluorescence spectra were measured in different organic solvents. The emission wavelength is blue shifted with the increase in solvent polarity.

APA, Harvard, Vancouver, ISO, and other styles

41

La, Duong Duc, Jotiram N. Malegaonkar, Mohammad Al Kobaisi, Rajesh S. Bhosale, Sidhanath V. Bhosale, and Sheshanath V. Bhosale. "Spermine-directed supramolecular self-assembly of water-soluble AIE-active tetraphenylethylene: nanobelt, nanosheet, globular and nanotubular structures." New Journal of Chemistry 42, no. 18 (2018): 15379–86. http://dx.doi.org/10.1039/c8nj02636j.

Full text

Abstract:

Tetrasulfonate-tetraphenylethylene (Su-TPE) is non-emissive in water and upon addition of a good solvent such as THF (f<sub>THF</sub> = 95%) it displays strong fluorescence emission with a quantum yield of 6.33%.

APA, Harvard, Vancouver, ISO, and other styles

42

Sikorski, M., E. Sikorska, F. Wilkinson, and R. P. Steer. "Studies of the photophysics and spectroscopy of alloxazine and related compounds in solution and in the solid state." Canadian Journal of Chemistry 77, no. 4 (1999): 472–80. http://dx.doi.org/10.1139/v99-076.

Full text

Abstract:

The absorption and emission spectra and the fluorescence lifetimes and quantum yields of alloxazine and several of its N- and C- methyl-substituted derivatives, including two isoalloxazines, have been measured in a nonpolar solvent (1,2-dichloroethane), a polar aprotic solvent (acetonitrile), and a polar protic solvent (ethanol). The excited state decays are all single exponential, suggesting that only one emitting species is present in all cases. The spectroscopic data show that the emitting species is the π,π* electronic excited state corresponding to the ground state of the absorbing molecu

APA, Harvard, Vancouver, ISO, and other styles

43

Hamciuc, Elena, Mihaela Homocianu, Corneliu Hamciuc, and Ionela-Daniela Carja. "Synthesis and photophysical study of new blue fluorescent poly(azomethine-1,3,4-oxadiazole)s containing dimethylamino groups." High Performance Polymers 30, no. 3 (2017): 339–46. http://dx.doi.org/10.1177/0954008317697367.

Full text

Abstract:

New aromatic polyazomethines were synthesized by polycondensation reaction of a diamine containing 1,3,4-oxadiazole ring, namely, 4,4′-diamino-4″-[2-(4-phenoxy)-5-(4-dimethylaminophenyl)-1,3,4-oxadiazole)]triphenylmethane, with terephthalic aldehyde or bis(4-formylphenoxyphenyl)fluorene, by using N-methyl-2-pyrrolidinone (NMP) as solvent. The polymers were easily soluble in polar solvents, such as NMP, N, N-dimethylacetamide, or chloroform, and showed high thermal stability with the initial decomposition temperature above 415°C and the temperature of 10% weight loss in the range of 450–460°C.

APA, Harvard, Vancouver, ISO, and other styles

44

Sanin, Edward V., Alexander I. Novikov, and Alexander D. Roshal. "Spectral Properties of Dyes with Interfragmental Charge Transfer: Solvatochromism and Solvatofluorochromism of 2-(3-Coumaroyl)-benzopyrylium Perchlorates." International Journal of Spectroscopy 2014 (December 23, 2014): 1–8. http://dx.doi.org/10.1155/2014/508153.

Full text

Abstract:

The paper deals with the spectral properties of dyes with interfragmental charge transfer, in particular, derivatives of 2-(3-coumaroyl)benzopyrylium (CBP) perchlorates. The positions of long-wavelength absorption and emission bands, quantum yields, and lifetimes of fluorescence were measured, mostly in aprotic solvents. Regression analysis of the relationship between the spectral characteristics of CBP and the main solvent parameters (polarity, polarisability, nucleophilicity, and electrophilicity) was carried out. It was found that the characteristics of CBP depend mainly on two solvent para

APA, Harvard, Vancouver, ISO, and other styles

45

Disanayaka, Bimsara W., and Alan C. Weedon. "Charge transfer fluorescence of some N-benzoylindoles." Canadian Journal of Chemistry 65, no. 2 (1987): 245–50. http://dx.doi.org/10.1139/v87-040.

Full text

Abstract:

The fluorescence properties of various N-carbonyl-substituted indoles (compounds 1–7) are examined. The N-benzoyl-indole derivatives 1 and 3–5 are shown to fluoresce weakly and the effect of solvent polarity upon the energy of the emitting state and upon the quantum yield of fluorescence is described. It is concluded that the initially formed singlet excited state is non-emissive and can relax to an intramolecular charge transfer state which is weakly fluorescent. The solvent effects are consistent with a general type of solvent interaction, and the solvent-induced shifts in the wavelength of

APA, Harvard, Vancouver, ISO, and other styles

46

El Seoud, Omar A. "Understanding solvation." Pure and Applied Chemistry 81, no. 4 (2009): 697–707. http://dx.doi.org/10.1351/pac-con-08-09-27.

Full text

Abstract:

The effects of solvents on different chemical phenomena, including reactivity, spectroscopic data, and swelling of biopolymers can be rationalized by use of solvatochromic probes, substances whose UV-vis spectra, absorption, or emission are sensitive to the properties of the medium. Thermo-solvatochromism refers to the effect of temperature on solvatochromism. The study of both phenomena sheds light on the relative importance of the factors that contribute to solvation, namely, properties of the probe, those of the solvent (acidity, basicity, dipolarity/polarizability, and lipophilicity), and

APA, Harvard, Vancouver, ISO, and other styles

47

Assiri, Mohammed A. "Exploring the optoelectronic properties of a chromene-appended pyrimidone derivative for photovoltaic applications." Open Chemistry 17, no. 1 (2019): 1167–72. http://dx.doi.org/10.1515/chem-2019-0119.

Full text

Abstract:

AbstractIn the present study, a chromene-appended pyrimidone derivative (PBA) has been synthesized in order to account for the relationship between chemical structure and charge transport properties. The optical properties of PBA were studied in different solvents; it displays a weak emission profile in polar protic solvents but is highly emissive in polar aprotic solvents. Quantum chemical approaches on this molecule were performed in detail to highlight the importance of and to better understand the structural and electronic effects of introducing substituted pyrimidone rings in a polyaromat

APA, Harvard, Vancouver, ISO, and other styles

48

Tarai, Arup, Meina Huang, Pintu Das, et al. "ICT and AIE Characteristics Two Cyano-Functionalized Probes and Their Photophysical Properties, DFT Calculations, Cytotoxicity, and Cell Imaging Applications." Molecules 25, no. 3 (2020): 585. http://dx.doi.org/10.3390/molecules25030585.

Full text

Abstract:

Two probes, AIE-1 and AIE-2, were synthesized to investigate the effect of substitutional functional group on aggregation (aggregation-caused quenching (ACQ) or aggregation-induced emission (AIE)) and intramolecular charge transfer (ICT) behavior as well as on the cell imaging aspect. The yellow-color non-substituted probe AIE-1 showed weak charge-transfer absorption and an emission band at 377 nm and 432 nm, whereas the yellowish-orange color substituted probe AIE-2 showed a strong charge-transfer absorption and an emission band at 424 nm and 477 nm in THF solvent. The UV-Vis studies of AIE-1

APA, Harvard, Vancouver, ISO, and other styles

49

OJALA, S., U. LASSI, M. HARKONEN, T. MAUNULA, R. SILVONEN, and R. KEISKI. "Durability of VOC catalysts in solvent emission oxidation." Chemical Engineering Journal 120, no. 1-2 (2006): 11–16. http://dx.doi.org/10.1016/j.cej.2006.03.023.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Wang, M., M. Shao, W. Chen, et al. "Trends of non-methane hydrocarbons (NMHC) emissions in Beijing during 2002–2013." Atmospheric Chemistry and Physics Discussions 14, no. 13 (2014): 18997–9031. http://dx.doi.org/10.5194/acpd-14-18997-2014.

Full text

Abstract:

Abstract. Non-methane hydrocarbons (NMHCs) play a critical role in the photochemical production of ozone (O3) and organic aerosols. Obtaining an accurate understanding on NMHC emission trends is essential for predicting air quality changes and evaluating the effectiveness of current control measures. In this study, we evaluated temporal trends in NMHC emissions in Beijing based on ambient measurements during the summer at an urban site in Beijing from 2002 to 2013. In contrast to the results of the most recent inventory (Multi-resolution Emission Inventory for China, MEIC), which reported that

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!