1
|
Zara A, Albu RM, Stoica I, Barzic AI, Dimitriu DG, Dorohoi DO. New Insights on Solvent-Induced Changes in Refractivity and Specific Rotation of Poly(propylene oxide) Systems Extracted from Channeled Spectra. Int J Mol Sci 2024; 25:4682. [PMID: 38731902 PMCID: PMC11083607 DOI: 10.3390/ijms25094682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 04/23/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024] Open
Abstract
Investigation of chiroptical polymers in the solution phase is paramount for designing supramolecular architectures for photonic or biomedical devices. This work is devoted to the case study of poly(propylene oxide) (PPO) optical activity in several solvents: benzonitrile, carbon disulfide, chloroform, ethyl acetate, and p-dioxane. To attain information on the interactions in these systems, rheological testing was undertaken, showing distinct variations of the rheological parameters as a function of the solvent type. These aspects are also reflected in the refractive index dispersive behavior, from which linear and non-linear optical properties are extracted. To determine the circular birefringence and specific rotation of the PPO solutions, the alternative method of the channeled spectra was employed. The spectral data were correlated with the molecular modeling of the PPO structural unit in the selected solvents. Density functional theory (DFT) computational data indicated that the torsional potential energy-related to the O1-C2-C3-O4 dihedral angle from the polymer repeating unit-was hindered in solvation environments characterized by high polarity and the ability to interact via hydrogen bonding. This was in agreement with the optical characterization of the samples, which indicated a lower circular birefringence and specific rotation for the solutions of PPO in ethyl acetate and p-dioxane. Also, the shape of optical rotatory dispersion curves was slightly modified for PPO in these solvents compared with the other ones.
Collapse
Affiliation(s)
- Alexandru Zara
- Faculty of Physics, “Alexandru Ioan Cuza” University, 700506 Iasi, Romania; (A.Z.); (D.O.D.)
| | - Raluca Marinica Albu
- “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania; (R.M.A.); (I.S.)
| | - Iuliana Stoica
- “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania; (R.M.A.); (I.S.)
| | - Andreea Irina Barzic
- “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania; (R.M.A.); (I.S.)
| | - Dan Gheorghe Dimitriu
- Faculty of Physics, “Alexandru Ioan Cuza” University, 700506 Iasi, Romania; (A.Z.); (D.O.D.)
| | - Dana Ortansa Dorohoi
- Faculty of Physics, “Alexandru Ioan Cuza” University, 700506 Iasi, Romania; (A.Z.); (D.O.D.)
| |
Collapse
|
2
|
Kowalkowska-Zedler D, Bruździak P, Hnatejko Z, Łyszczek R, Brillowska-Dąbrowska A, Ponikiewski Ł, Cieśla B, Pladzyk A. Solvent influence on the crystal structures of new cadmium tri-tert-butoxysilanethiolate complexes with 1,4-bis(3-aminopropyl)piperazine: luminescence and antifungal activity. Acta Crystallogr C Struct Chem 2023; 79:S2053229623005442. [PMID: 37405860 PMCID: PMC10404125 DOI: 10.1107/s2053229623005442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 06/20/2023] [Indexed: 07/07/2023] Open
Abstract
Monocrystals of dinuclear μ-1,4-bis(3-aminopropyl)piperazine-κ4N1,N1':N4,N4'-bis[bis(tri-tert-butoxysilanethiolato-κS)cadmium(II)], [Cd2(C12H27O3SSi)4(C10H24N4)] or [Cd2{SSi(OtBu)3}4(μ-BAPP)], 1, and polynuclear catena-poly[[bis(tri-tert-butoxysilanethiolato-κS)cadmium(II)]-μ-1,4-bis(3-aminopropyl)piperazine-κ2N1':N4'], [Cd(C12H27O3SSi)2(C10H24N4)]n or [Cd{SSi(OtBu)3}2(μ-BAPP)]n, 2, with 1,4-bis(3-aminopropyl)piperazine (BAPP) and tri-tert-butoxysilanethiolate ligands, were obtained from the same ratio of reactants, but with different solvents used for the crystallization processes. The structures and properties of both complexes were characterized using elemental analysis, X-ray diffraction and FT-IR, 1H NMR and luminescence spectroscopy. Applied density functional theory (DFT) computational methods and noncovalent interaction (NCI) analysis were used for geometry optimization and visualization of the interactions between the metallic centres and their surroundings. he X-ray analysis revealed four-coordinate CdII centres bound to two S atoms of the silanethiolate groups and two N atoms of the BAPP ligand; however, it chelates to tertiary and primary N atoms in 1, whilst in 2 it does not chelate and bonds only to RNH2. The photoluminescence properties of complexes 1 and 2 result from free-ligand emission and differ significantly from each other with respect to emission intensity. Additionally, antifungal activity was investigated against 18 isolates of fungi. Compound 1 strongly inhibited the growth of three dermatophytes: Epidermophyton floccosum, Microsporum canis and Trichophyton rubrum.
Collapse
Affiliation(s)
- Daria Kowalkowska-Zedler
- Department of Inorganic Chemistry, Gdańsk University of Technology, Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Piotr Bruździak
- Department of Physical Chemistry, Gdańsk University of Technology, Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Zbigniew Hnatejko
- Department of Rare Earths, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, Poznań 61-614, Poland
| | - Renata Łyszczek
- Department of General and Coordination Chemistry, Maria Curie-Skłodowska University, PL. M.C. Skłodowska-Curie 2, Lublin 20-031, Poland
| | - Anna Brillowska-Dąbrowska
- Department of Molecular Biotechnology and Microbiology, Gdańsk University of Technology, Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Łukasz Ponikiewski
- Department of Inorganic Chemistry, Gdańsk University of Technology, Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Bartosz Cieśla
- Department of Inorganic Chemistry, Gdańsk University of Technology, Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Agnieszka Pladzyk
- Department of Inorganic Chemistry, Gdańsk University of Technology, Narutowicza 11/12, Gdańsk 80-233, Poland
| |
Collapse
|
3
|
Shen Y, Cruz-Cabeza AJ, Azzouz O, Edkins K. Using Prenucleation Aggregation of Caffeine-Benzoic Acid as a Rapid Indication of Co-crystallization from Solutions. Mol Pharm 2023; 20:1942-1950. [PMID: 36942815 DOI: 10.1021/acs.molpharmaceut.2c00829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Co-crystal design is a convenient way to remedy the poor biopharmaceutical properties of drugs. Most studies focus on experimental co-crystal screening or computational prediction, but hardly any work has been done toward fast, efficient, and reliable prediction of solution crystallization for co-crystal formation. Here, we study the caffeine-benzoic acid co-crystal system, due to its reported difficulty to crystallize from the solution phase. With this work, we investigate whether there is a link between prenucleation aggregation in solution and co-crystal formation and how to harness this for crystallization prediction. 1H and 13C NMR spectroscopy is used to study the prenucleation interaction between caffeine and benzoic acid in methanol, acetone, and acetonitrile as examples of common solvents. In this system, crystallization from methanol leads to no co-crystallization, from acetone to concomitant crystallization of co-crystal and caffeine, and from acetonitrile to pure co-crystal formation from solution. Strong heteromeric dimers were found to exist in all three solvents. Ternary phase diagrams were defined and a solution-accessible co-crystal region was found for all solvents. For this system, the prenucleation clusters found in solution could be linked to the crystallization of the co-crystal. Crystallization from DMSO did not yield the co-crystal and there were no detectable prenucleation aggregates. NMR spectroscopy to probe dimers in solution can thus be used as a fast, reliable, and promising tool to predict co-crystallization from specific solvents and to screen for suitable solvents for manufacturing and scale-up.
Collapse
Affiliation(s)
- Yichun Shen
- School of Health Sciences, University of Manchester, Manchester M13 9PT, U.K
| | | | - Ossama Azzouz
- School of Health Sciences, University of Manchester, Manchester M13 9PT, U.K
| | - Katharina Edkins
- School of Health Sciences, University of Manchester, Manchester M13 9PT, U.K
| |
Collapse
|
4
|
Konsago SW, Žiberna K, Kmet B, Benčan A, Uršič H, Malič B. Chemical Solution Deposition of Barium Titanate Thin Films with Ethylene Glycol as Solvent for Barium Acetate. Molecules 2022; 27:3753. [PMID: 35744879 DOI: 10.3390/molecules27123753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 06/07/2022] [Accepted: 06/08/2022] [Indexed: 02/05/2023] Open
Abstract
Chemical solution deposition (CSD) of BaTiO3 (BT) or BT-based thin films relies on using a carboxylic acid and alcohol as the solvents for alkaline-earth carboxylate and transition-metal alkoxide, respectively; however, the esterification reaction of the solvents may lead to in-situ water formation and precipitation. To avoid such an uncontrolled reaction, we developed a route in which ethylene glycol (EG) is used as the solvent for Ba-acetate. The EG-based BT coating solutions are stable for at least a few months. The thermal decomposition of the BT xerogel obtained by drying the EG-based solutions depends on the choice of the solvent for the Ti-alkoxide as well: in the case of EG and 2-methoxyethanol solvents carbon residues are removed at only about 1100 °C, while in the case of ethanol it is concluded at about 700 °C. About 100 nm thick BT films derived from the EG-ethanol solution deposited on platinized silicon reveal dense, crack-free columnar microstructure. They exhibit local ferro- and piezoelectric properties. The macroscopic polarization-electric field loops were obtained up to a quite high electric field of about 2.4 MV/cm. The EG-ethanol based CSD route is a viable alternative to the established acetic acid–alcohol route for BT and BT-based films.
Collapse
|
5
|
Kuosmanen RT, Truong K, Rissanen KT, Sievänen EI. The Effect of the Side Chain on Gelation Properties of Bile Acid Alkyl Amides. ChemistryOpen 2021; 10:1150-1157. [PMID: 34806846 PMCID: PMC8607806 DOI: 10.1002/open.202100245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/02/2021] [Indexed: 11/06/2022] Open
Abstract
Six bile acid alkyl amide derivatives were studied with respect to their gelation properties. The derivatives were composed of three different bile acids with hexyl or cyclohexyl side chains. The gelation behaviour of all six compounds were studied for 36 solvents with varying polarities. Gelation was observed mainly in aromatic solvents, which is characteristic for bile-acid-based low molecular weight gelators. Out of 108 bile acid-solvent combinations, a total of 44 gel systems were formed, 28 of which from lithocholic acid derivatives, only two from deoxycholic acid derivatives, and 14 from cholic acid derivatives. The majority of the gel systems were formed from bile acids with hexyl side chains, contrary to the cyclohexyl group, which seems to be a poor gelation moiety. These results indicate that the spatial demand of the side chain is the key feature for the gelation properties of the bile acid amides.
Collapse
Affiliation(s)
- Riikka T. Kuosmanen
- Department of ChemistryUniversity of JyvaskylaP.O. Box 3540014JyväskyläFinland
| | - Khai‐Nghi Truong
- Department of ChemistryUniversity of JyvaskylaP.O. Box 3540014JyväskyläFinland
| | - Kari T. Rissanen
- Department of ChemistryUniversity of JyvaskylaP.O. Box 3540014JyväskyläFinland
| | - Elina I. Sievänen
- Department of ChemistryUniversity of JyvaskylaP.O. Box 3540014JyväskyläFinland
| |
Collapse
|
6
|
Mätzig J, Drache M, Beuermann S. Self-Initiated Butyl Acrylate Polymerizations in Bulk and in Solution Monitored By In-Line Techniques. Polymers (Basel) 2021; 13:2021. [PMID: 34205620 DOI: 10.3390/polym13122021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 06/17/2021] [Accepted: 06/18/2021] [Indexed: 02/03/2023] Open
Abstract
High-temperature acrylate polymerizations are technically relevant, but yet not fully understood. In particular the mechanism and the kinetics of the thermal self-initiation is a topic of current research. To obtain more detailed information the conversion dependence of the polymerization rate, rbr, is determined via in-line DSC and FT-NIR spectroscopy for reactions in bulk and in solution at temperatures ranging from 80 to 160 °C. Solution polymerizations revealed that dioxane is associated with the highest rbr, while aromatic solvents result in the lowest values of rbr. Interestingly, rbr for polymerizations in solution with dioxane depends on the actual monomer concentration at a given time in the system, but is not depending on the initial monomer concentration. The overall rate of polymerization in bulk and in solution is well represented by an equation with three or four parameters, respectively, being estimated by multiple linear regression and the temperature as additional parameter.
Collapse
|
7
|
Weiß M, Brehm M. Exploring Free Energy Profiles of Enantioselective Organocatalytic Aldol Reactions under Full Solvent Influence. Molecules 2020; 25:E5861. [PMID: 33322424 PMCID: PMC7764805 DOI: 10.3390/molecules25245861] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/05/2020] [Accepted: 12/08/2020] [Indexed: 12/29/2022] Open
Abstract
We present a computational study on the enantioselectivity of organocatalytic proline-catalyzed aldol reactions between aldehydes in dimethylformamide (DMF). To explore the free energy surface of the reaction, we apply two-dimensional metadynamics on top of ab initio molecular dynamics (AIMD) simulations with explicit solvent description on the DFT level of theory. We avoid unwanted side reactions by utilizing our newly developed hybrid AIMD (HyAIMD) simulation scheme, which adds a simple force field to the AIMD simulation to prevent unwanted bond breaking and formation. Our condensed phase simulation results are able to nicely reproduce the experimental findings, including the main stereoisomer that is formed, and give a correct qualitative prediction of the change in syn:anti product ratio with different substituents. Furthermore, we give a microscopic explanation for the selectivity. We show that both the explicit description of the solvent and the inclusion of entropic effects are vital to a good outcome-metadynamics simulations in vacuum and static nudged elastic band (NEB) calculations yield significantly worse predictions when compared to the experiment. The approach described here can be applied to a plethora of other enantioselective or organocatalytic reactions, enabling us to tune the catalyst or determine the solvent with the highest stereoselectivity.
Collapse
Affiliation(s)
| | - Martin Brehm
- Institut für Chemie, Martin-Luther-Universität Halle-Wittenberg, von-Danckelmann-Platz 4, D-06120 Halle (Saale), Germany;
| |
Collapse
|
8
|
Abstract
Solvent-protein interactions are important for protein biological functions, especially for a coupled folding and binding system such as insulin. By monitoring the change in the conformation of insulin dimers during dissociation with temperature-jump infrared spectroscopy, we show that co-solvents can significantly destabilize the dimers by perturbing their hydrophobic center. The transition from the native to intermediate dimer state is observed as the buried residues are exposed to solvents in the presence of 10% dimethyl sulfoxide and with α-helices unfolding when ethanol is present, which reduces the dissociation time dramatically to 50% and 20% of the value in a D2O solution, respectively. We propose a self-consistent analysis using complementary methods to resolve this coupled folding and binding process and obtain a much higher rate of monomer association than of intermediate folding. Our results demonstrate that the conformational changes are critical in dimer formation and strongly affected by co-solvents.
Collapse
Affiliation(s)
- Xin-Xing Zhang
- Department of Chemistry, James Franck Institute, and Institute for Biophysical Dynamics, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
| | - Andrei Tokmakoff
- Department of Chemistry, James Franck Institute, and Institute for Biophysical Dynamics, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
| |
Collapse
|
9
|
Nunes R, Pasko P, Tyszka-Czochara M, Szewczyk A, Szlosarczyk M, Carvalho IS. Antibacterial, antioxidant and anti-proliferative properties and zinc content of five south Portugal herbs. Pharm Biol 2017; 55:114-123. [PMID: 27925492 PMCID: PMC7011791 DOI: 10.1080/13880209.2016.1230636] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
CONTEXT Crataegus monogyna L. (Rosaceae) (CM), Equisetum telmateia L. (Equisataceae) (ET), Geranium purpureum Vil. (Geraniaceae) (GP), Mentha suaveolens Ehrh. (Lamiaceae) (MS), and Lavandula stoechas L. spp. luisieri (Lamiaceae) (LS) are all medicinal. OBJECTIVE To evaluate the antioxidant, antiproliferative and antimicrobial activities of plant extracts and quantify individual phenolics and zinc. MATERIAL AND METHODS Aerial part extracts were prepared with water (W), ethanol (E) and an 80% mixture (80EW). Antioxidant activity was measured with TAA, FRAP and RP methods. Phenolics were quantified with a HPLC. Zinc was quantified using voltammetry. Antibacterial activity (after 48 h) was tested using Enterococcus faecalis, Bacillus cereus, Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa and Listeria monocytogenes. Antiproliferative activity (after 24 h) was tested using HEP G2 cells and fibroblasts. RESULTS Solvents influenced results; the best were E and 80EW. GP had the highest antioxidant activity (TAA and FRAP of 536.90 mg AAE/g dw and 783.48 mg TE/g dw, respectively). CM had the highest zinc concentration (37.21 mg/kg) and phenolic variety, with neochlorogenic acid as the most abundant (92.91 mg/100 g dw). LS was rich in rosmarinic acid (301.71 mg/100 g dw). GP and LS inhibited the most microorganisms: B. cereus, E. coli and S. aureus. GP also inhibited E. faecalis. CM had the lowest MIC: 5830 μg/mL. The antibacterial activity is explained by the phenolics present. LS and CM showed the most significant anti-proliferative activity, which is explained by their zinc content. CONCLUSION The most promising plants for further studies are CM, LS and GP.
Collapse
Affiliation(s)
- Ricardo Nunes
- MeditBio, Faculty of Sciences and Technology, University of Algarve, Campus de Gambelas, Faro, Portugal
| | - Pawel Pasko
- Department of Food Chemistry and Nutrition, Medical College, Jagiellonian University, Krakow, Poland
- Department of Clinical Science, Faculty of Health and Medical Science, Andrzej Frycz-Modrzewski Krakow University, Poland
| | - Malgorzata Tyszka-Czochara
- Radioligand Laboratory, Department of Pharmacobiology, Medical College, Jagiellonian University, Krakow, Poland
| | - Agnieszka Szewczyk
- Department of Pharmaceutical Botany, Medical College, Jagiellonian University, Krakow, Poland
| | - Marek Szlosarczyk
- Department of Inorganic and Analytical Chemistry, Medical College, Jagiellonian University, Krakow, Poland
| | - Isabel S. Carvalho
- MeditBio, Faculty of Sciences and Technology, University of Algarve, Campus de Gambelas, Faro, Portugal
- CONTACT Isabel S. CarvalhoFood Science Laboratory, Faculty of Sciences and Technology, University of Algarve, Campus Gambelas, Building 8 8005-139 Faro, Portugal
| |
Collapse
|