Influence of Organic-Modified Inorganic Matrices on the Optical Properties of Palygorskite–Curcumin-Type Hybrid Materials
Clays are very important from an economic and application point of view, as they are suitable hosts for organic compounds. In order to diversify the fields of application, they are structurally modified by physical or chemical methods with cationic species, and/or different bifunctional compounds, s...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-07-01
|
| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/12/7/1005 |
| _version_ | 1797406880595705856 |
|---|---|
| author | Florentina Monica Raduly Valentin Rădițoiu Radu Claudiu Fierăscu Alina Rădițoiu Cristian Andi Nicolae Violeta Purcar |
| author_facet | Florentina Monica Raduly Valentin Rădițoiu Radu Claudiu Fierăscu Alina Rădițoiu Cristian Andi Nicolae Violeta Purcar |
| author_sort | Florentina Monica Raduly |
| collection | DOAJ |
| description | Clays are very important from an economic and application point of view, as they are suitable hosts for organic compounds. In order to diversify the fields of application, they are structurally modified by physical or chemical methods with cationic species, and/or different bifunctional compounds, such as organosilanes. In this study, palygorskite was modified with (3-Aminopropyl) triethoxysilane, which was subsequently modified at the amino group by grafting an acetate residue. By using this strategy, two types of host hybrid materials were obtained on which curcumin derivatives were deposited. The composites obtained were structurally characterized and their photophysical properties were investigated in relation to the structure of the host matrices and interactions with curcumin-type visiting species. The hybrid composites have different colors (orange, yellow, pink), depending on the polarity of the inorganic matrices modulated by different organic groups grafted at the surface. Fluorescence emission in the visible range is characterized by the presence of two emission maxima, one belonging to the chromophore and the other influenced by the physical interactions between auxochromes and host matrices. These hybrid materials, compared to other composite structures, are obtained by a simple adsorption process. They are temperature stable in aggressive environments (acid/base) and render the fluorescent properties of dyes redundant, with improved luminescent performance compared to them. |
| first_indexed | 2024-03-09T03:33:04Z |
| format | Article |
| id | doaj.art-ff962bfd4008451f8e82a12a8fdf95e0 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-09T03:33:04Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-ff962bfd4008451f8e82a12a8fdf95e02023-12-03T14:52:50ZengMDPI AGCrystals2073-43522022-07-01127100510.3390/cryst12071005Influence of Organic-Modified Inorganic Matrices on the Optical Properties of Palygorskite–Curcumin-Type Hybrid MaterialsFlorentina Monica Raduly0Valentin Rădițoiu1Radu Claudiu Fierăscu2Alina Rădițoiu3Cristian Andi Nicolae4Violeta Purcar5National Research and Development Institute for Chemistry and Petrochemistry—ICECHIM, 202 Splaiul Independentei, 6th District, 060021 Bucharest, RomaniaNational Research and Development Institute for Chemistry and Petrochemistry—ICECHIM, 202 Splaiul Independentei, 6th District, 060021 Bucharest, RomaniaNational Research and Development Institute for Chemistry and Petrochemistry—ICECHIM, 202 Splaiul Independentei, 6th District, 060021 Bucharest, RomaniaNational Research and Development Institute for Chemistry and Petrochemistry—ICECHIM, 202 Splaiul Independentei, 6th District, 060021 Bucharest, RomaniaNational Research and Development Institute for Chemistry and Petrochemistry—ICECHIM, 202 Splaiul Independentei, 6th District, 060021 Bucharest, RomaniaNational Research and Development Institute for Chemistry and Petrochemistry—ICECHIM, 202 Splaiul Independentei, 6th District, 060021 Bucharest, RomaniaClays are very important from an economic and application point of view, as they are suitable hosts for organic compounds. In order to diversify the fields of application, they are structurally modified by physical or chemical methods with cationic species, and/or different bifunctional compounds, such as organosilanes. In this study, palygorskite was modified with (3-Aminopropyl) triethoxysilane, which was subsequently modified at the amino group by grafting an acetate residue. By using this strategy, two types of host hybrid materials were obtained on which curcumin derivatives were deposited. The composites obtained were structurally characterized and their photophysical properties were investigated in relation to the structure of the host matrices and interactions with curcumin-type visiting species. The hybrid composites have different colors (orange, yellow, pink), depending on the polarity of the inorganic matrices modulated by different organic groups grafted at the surface. Fluorescence emission in the visible range is characterized by the presence of two emission maxima, one belonging to the chromophore and the other influenced by the physical interactions between auxochromes and host matrices. These hybrid materials, compared to other composite structures, are obtained by a simple adsorption process. They are temperature stable in aggressive environments (acid/base) and render the fluorescent properties of dyes redundant, with improved luminescent performance compared to them.https://www.mdpi.com/2073-4352/12/7/1005hybrid materialspalygorskitecurcumin derivativesX-ray diffractionfluorescence emission |
| spellingShingle | Florentina Monica Raduly Valentin Rădițoiu Radu Claudiu Fierăscu Alina Rădițoiu Cristian Andi Nicolae Violeta Purcar Influence of Organic-Modified Inorganic Matrices on the Optical Properties of Palygorskite–Curcumin-Type Hybrid Materials Crystals hybrid materials palygorskite curcumin derivatives X-ray diffraction fluorescence emission |
| title | Influence of Organic-Modified Inorganic Matrices on the Optical Properties of Palygorskite–Curcumin-Type Hybrid Materials |
| title_full | Influence of Organic-Modified Inorganic Matrices on the Optical Properties of Palygorskite–Curcumin-Type Hybrid Materials |
| title_fullStr | Influence of Organic-Modified Inorganic Matrices on the Optical Properties of Palygorskite–Curcumin-Type Hybrid Materials |
| title_full_unstemmed | Influence of Organic-Modified Inorganic Matrices on the Optical Properties of Palygorskite–Curcumin-Type Hybrid Materials |
| title_short | Influence of Organic-Modified Inorganic Matrices on the Optical Properties of Palygorskite–Curcumin-Type Hybrid Materials |
| title_sort | influence of organic modified inorganic matrices on the optical properties of palygorskite curcumin type hybrid materials |
| topic | hybrid materials palygorskite curcumin derivatives X-ray diffraction fluorescence emission |
| url | https://www.mdpi.com/2073-4352/12/7/1005 |
| work_keys_str_mv | AT florentinamonicaraduly influenceoforganicmodifiedinorganicmatricesontheopticalpropertiesofpalygorskitecurcumintypehybridmaterials AT valentinraditoiu influenceoforganicmodifiedinorganicmatricesontheopticalpropertiesofpalygorskitecurcumintypehybridmaterials AT raduclaudiufierascu influenceoforganicmodifiedinorganicmatricesontheopticalpropertiesofpalygorskitecurcumintypehybridmaterials AT alinaraditoiu influenceoforganicmodifiedinorganicmatricesontheopticalpropertiesofpalygorskitecurcumintypehybridmaterials AT cristianandinicolae influenceoforganicmodifiedinorganicmatricesontheopticalpropertiesofpalygorskitecurcumintypehybridmaterials AT violetapurcar influenceoforganicmodifiedinorganicmatricesontheopticalpropertiesofpalygorskitecurcumintypehybridmaterials |