scholarly journals Organic Acid Regulated Self-Assembly and Photophysical Properties of Perylene Bisimide Derivatives

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1656
Author(s):  
Ying Wang ◽  
Xinguo Yang ◽  
Siyu Li ◽  
Tao Long ◽  
Wei Li
Keyword(s):  
Organic Acids ◽  
Organic Acid ◽  
Self Assembly ◽  
Color Change ◽  
Photophysical Properties ◽  
Blue Color ◽  
Perylene Bisimide ◽  
Acid Type ◽  
Visible Spectra ◽  
Uv Visible

In this work, perylene bisimide derivatives (PBI-1 and PBI-2) with tertiary amine groups were designed and synthesized. To control the final morphologies and properties of their aggregates, seven kinds of organic acids were used to alter the self-assembly environment. The influence of organic acids on the morphology of the aggregates was investigated. Photophysical properties of the aggregates were markedly affected by the kind and concentration of the organic acid. The thermal and gas sensitivities of the PBI-1 aggregates were studied with the use of UV–visible spectroscopy and digital imaging. The shift of the UV–visible spectra varied with time, temperature, acid type and acid concentration. Furthermore, PBI-1 aggregates showed a red-to-blue color change after addition of seven organic acids, whereas the color of the PBI-2 aggregates remained red. These changes of morphologies, photophysical properties and their thermal and gas sensitivities make these aggregates potentially useful in the fields of optoelectronics or sensors.

Self-assembly and photophysical properties of a minuscule tailed perylene bisimide

2013 ◽  
Vol 16 (2) ◽  
pp. 461-466 ◽  
Author(s):  
M. Murugavelu ◽  
P.K.M. Imran ◽  
K.R. Sankaran ◽  
S. Nagarajan
Keyword(s):  
Self Assembly ◽  
Photophysical Properties ◽  
Perylene Bisimide

Biphasic Self-Assembly Pathways and Size-Dependent Photophysical Properties of Perylene Bisimide Dye Aggregates

2013 ◽  
Vol 135 (50) ◽  
pp. 18722-18725 ◽  
Author(s):  
Franziska Fennel ◽  
Steffen Wolter ◽  
Zengqi Xie ◽  
Per-Arno Plötz ◽  
Oliver Kühn ◽  
...  
Keyword(s):  
Self Assembly ◽  
Photophysical Properties ◽  
Perylene Bisimide ◽  
Size Dependent ◽  
Assembly Pathways

Structural studies on the glycolato, lactato, and mandelato solid complexes of some bivalent iron series metals

1969 ◽  
Vol 47 (14) ◽  
pp. 2629-2637 ◽  
Author(s):  
Andrew Fischinger ◽  
Allen Sarapu ◽  
Audrey Companion
Keyword(s):  
Color Change ◽  
Electronic Absorption Spectra ◽  
Field Analysis ◽  
Ligand Field ◽  
Blue Color ◽  
Structural Studies ◽  
X Ray ◽  
Tentative Model ◽  
Visible Spectra ◽  
Bivalent Iron

Electronic absorption spectra, infrared vibrational spectra, and X-ray powder patterns have been measured for anhydrous bis(glycolato), bis(lactato), and bis(mandelato) complexes of bivalent Mn, Co, Ni, Cu, and Zn. Despite indications of considerable differences in crystal structure, the visible spectra of all complexes are quite similar to those of analogous hexaaquo complexes. A ligand field analysis yields as new data a spectrochemical series for the ligands[Formula: see text]in agreement with the order of proposed metal–oxygen stretch frequencies and previously measured acid pK's of the ligands.An interesting red to blue color change, observed in all cobalt complexes on heating, is shown to be reversible in the glycolate. A tentative model proposed for the complex appears to be consistent with all the experimental data including the color change phenomena.

scholarly journals Perylene bisimide hydrogels and lyotropic liquid crystals with temperature-responsive color change

2016 ◽  
Vol 7 (11) ◽  
pp. 6786-6790 ◽  
Author(s):  
Daniel Görl ◽  
Bartolome Soberats ◽  
Stefanie Herbst ◽  
Vladimir Stepanenko ◽  
Frank Würthner
Keyword(s):  
Liquid Crystals ◽  
Self Assembly ◽  
Color Change ◽  
Temperature Response ◽  
Lyotropic Liquid Crystals ◽  
Social Self ◽  
Perylene Bisimide ◽  
Temperature Responsive ◽  
Lcst Behavior

Tuning of the temperature response of perylene bisimide hydrogels exhibiting LCST behavior has been achieved by social self-assembly in water.

Infrared and UV-visible spectra of layer semiconductors Gas, GaSe and GaTe

1977 ◽  
Vol 38 (10) ◽  
pp. 1293-1299 ◽  
Author(s):  
U. Giorgianni ◽  
G. Mondio ◽  
P. Perillo ◽  
G. Saitta ◽  
G. Vermiglio
Keyword(s):  
Visible Spectra ◽  
Uv Visible

Self-assembling behaviour of a modified aromatic amino acid in competitive medium

Soft Matter ◽  
2020 ◽  
Vol 16 (28) ◽  
pp. 6599-6607 ◽  
Author(s):  
Pijush Singh ◽  
Souvik Misra ◽  
Nayim Sepay ◽  
Sanjoy Mondal ◽  
Debes Ray ◽  
...  
Keyword(s):  
Amino Acid ◽  
Self Assembly ◽  
Aromatic Amino Acid ◽  
Photophysical Properties ◽  
Solvent Mixture ◽  
The Self ◽  
Solvent Ratio ◽  
Self Assembling

The self-assembly and photophysical properties of 4-nitrophenylalanine (4NP) are changed with the alteration of solvent and final self-assembly state of 4NP in competitive solvent mixture and are dictated by the solvent ratio.

scholarly journals An In-Situ Reaction Route to Molecular Level Dispersed Bisimide and ZnO Nanorod Hybrids with Efficient Photo-Induced Charge Transfer

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Chunzheng Lv ◽  
Lirong He ◽  
Jiahong Tang ◽  
Feng Yang ◽  
Chuhong Zhang
Keyword(s):  
Charge Transfer ◽  
Electric Field ◽  
Self Assembly ◽  
Molecular Level ◽  
Surface Photovoltage ◽  
Zno Nanorod ◽  
In Situ Reaction ◽  
Perylene Bisimide ◽  
Induced Charge

AbstractAs an important photoconductive hybrid material, perylene/ZnO has attracted tremendous attention for photovoltaic-related applications, but generally faces a great challenge to design molecular level dispersed perylenes/ZnO nanohybrids due to easy phase separation between perylenes and ZnO nanocrystals. In this work, we reported an in-situ reaction method to prepare molecular level dispersed H-aggregates of perylene bisimide/ZnO nanorod hybrids. Surface photovoltage and electric field-induced surface photovoltage spectrum show that the photovoltage intensities of nanorod hybrids increased dramatically for 100 times compared with that of pristine perylene bisimide. The enhancement of photovoltage intensities resulting from two aspects: (1) the photo-generated electrons transfer from perylene bisimide to ZnO nanorod due to the electric field formed on the interface of perylene bisimide/ZnO; (2) the H-aggregates of perylene bisimide in ZnO nanorod composites, which is beneficial for photo-generated charge separation and transportation. The introduction of ordered self-assembly thiol-functionalized perylene-3,4,9,10-tetracarboxylic diimide (T-PTCDI)/ ZnO nanorod composites induces a significant improvement in incident photo-to-electron conversion efficiency. This work provides a novel mentality to boost photo-induced charge transfer efficiency, which brings new inspiration for the preparation of the highly efficient solar cell.

scholarly journals PSVIII-16 The effects of adding two organic acid blends with or without high levels of zinc or copper, on post-weaning pig performance

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 209-210
Author(s):  
Casey L Bradley ◽  
Jon Bergstrom ◽  
Jeremiah Nemechek ◽  
J D Hahn
Keyword(s):  
Phosphoric Acid ◽  
Benzoic Acid ◽  
Organic Acids ◽  
Organic Acid ◽  
Factorial Design ◽  
Sodium Butyrate ◽  
Weaned Pigs ◽  
Weaning Pig ◽  
Pig Performance ◽  
Dietary Treatments

Abstract A subset of 720 weaned pigs (6.44 ± 0.1 kg, PIC genetics, approximately 21-d of age) were used in a 42-d trial with a 2x3 factorial design evaluating the effects of adding organic acid (OA) blends [factor 1 = no organic acid (NO), Acid Pak 1 (AP1), Acid Pak 2 (AP2)] to diets with or without higher levels of Zn or Cu [factor 2 = +/-PZC] on pig performance. Pigs were allotted 10 pigs/pen to 12 weight blocks and randomly assigned the six dietary treatments. The +PZC diets contained 3000 ppm Zn (d 0-7), 2000 ppm Zn (d 8-21), and 250 ppm Cu (d 21-42) and -PZC diets contained 95 ppm Zn and 20 ppm Cu (d 0-42). The AP1 and AP2 diets used 0.9% of 2 acid premixes (d 0-21), and 0.45% of the premixes (day 22-42). AP1 provided 0.5% benzoic acid, 0.07% sodium butyrate, and 0.025% phosphoric acid (day 0-21) and half those levels (day 22-42). AP2 included the same acids as AP1 but at half the rate and combined with 7 other organic acids and carvacrol. From d 0-21, ADG, ADFI, and G:F were improved (P< 0.01) by +PZC compared to -PZC and by AP1 or AP2 compared to NO (P< 0.02). Overall (d 0-42), ADG and G:F were improved (P< 0.01) by +PZC compared to -PZC and by AP1 or AP2 compared to NO (P< .010). Data from this trial indicate that performance was improved by the addition of both OA and PZC. However, pigs fed OA and -PZC performed similarly to those fed NO and +PZC in the post-weaning period. In summary, regardless of the acid combination, organic acid supplementation has the potential to improve growth performance in weaned pigs.

scholarly journals Luminescent Supramolecular Nano- or Microstructures Formed in Aqueous Media by Amphiphile-Noble Metal Complexes

2020 ◽  
Vol 2020 ◽  
pp. 1-24 ◽  
Author(s):  
Carmen Cretu ◽  
Loredana Maiuolo ◽  
Domenico Lombardo ◽  
Elisabeta I. Szerb ◽  
Pietro Calandra
Keyword(s):  
Noble Metal ◽  
Smart Materials ◽  
Self Assembly ◽  
Noble Metals ◽  
Photophysical Properties ◽  
Aqueous Media ◽  
Molecular Architecture ◽  
Stimuli Responsive ◽  
Panoramic View ◽  
Amphiphilic Molecules

The involvement of metal ions within the self-assembly spontaneously occurring in surfactant-based systems gives additional and interesting features. The electronic states of the metal, together with the bonds that can be established with the organic amphiphilic counterpart, are the factors triggering new photophysical properties. Moreover, the availability of stimuli-responsive supramolecular amphiphile assemblies, able to disassemble in a back-process, provides reversible switching particularly useful in novel approaches and applications giving rise to truly smart materials. In particular, small amphiphiles with an inner distribution, within their molecular architecture, of various polar and apolar functional groups, can give a wide variety of interactions and therefore enriched self-assemblies. If it is joined with the opportune presence and localization of noble metals, whose chemical and photophysical properties are undiscussed, then very interesting materials can be obtained. In this minireview, the basic concepts on self-assembly of small amphiphilic molecules with noble metals are shown with particular reference to the photophysical properties aiming at furnishing to the reader a panoramic view of these exciting problematics. In this respect, the following will be shown: (i) the principles of self-assembly of amphiphiles that involve noble metals, (ii) examples of amphiphiles and amphiphile-noble metal systems as representatives of systems with enhanced photophysical properties, and (iii) final comments and perspectives with some examples of modern applications.

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