A Window into the Workings of <i>anti</i>-B<sub>18</sub>H<sub>22</sub> Luminescence—Blue-Fluorescent Isomeric Pair 3,3′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> and 3,4′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (and Others)
The action of AlCl<sub>3</sub> on room-temperature tetrachloromethane solutions of <i>anti</i>-B<sub>18</sub>H<sub>22</sub> (<b>1</b>) results in a mixture of fluorescent isomers, 3,3′-Cl<sub>2</sub>-B<sub>18</sub>H&...
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| Format: | Article |
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MDPI AG
2023-06-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/11/4505 |
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| author | Marcel Ehn Dmytro Bavol Jonathan Bould Vojtěch Strnad Miroslava Litecká Kamil Lang Kaplan Kirakci William Clegg Paul G. Waddell Michael G. S. Londesborough |
| author_facet | Marcel Ehn Dmytro Bavol Jonathan Bould Vojtěch Strnad Miroslava Litecká Kamil Lang Kaplan Kirakci William Clegg Paul G. Waddell Michael G. S. Londesborough |
| author_sort | Marcel Ehn |
| collection | DOAJ |
| description | The action of AlCl<sub>3</sub> on room-temperature tetrachloromethane solutions of <i>anti</i>-B<sub>18</sub>H<sub>22</sub> (<b>1</b>) results in a mixture of fluorescent isomers, 3,3′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (<b>2</b>) and 3,4′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (<b>3</b>), together isolated in a 76% yield. Compounds <b>2</b> and <b>3</b> are capable of the stable emission of blue light under UV-excitation. In addition, small amounts of other dichlorinated isomers, 4,4′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (<b>4</b>), 3,1′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (<b>5</b>), and 7,3′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (<b>6</b>) were isolated, along with blue-fluorescent monochlorinated derivatives, 3-Cl-B<sub>18</sub>H<sub>21</sub> (<b>7</b>) and 4-Cl-B<sub>18</sub>H<sub>21</sub> (<b>8</b>), and trichlorinated species 3,4,3′-Cl<sub>3</sub>-B<sub>18</sub>H<sub>19</sub> (<b>9</b>) and 3,4,4′-Cl<sub>3</sub>-B<sub>18</sub>H<sub>19</sub> (<b>10</b>). The molecular structures of these new chlorinated derivatives of octadecaborane are delineated, and the photophysics of some of these species are discussed in the context of the influence that chlorination bears on the luminescence of <i>anti</i>-B<sub>18</sub>H<sub>22</sub>. In particular, this study produces important information on the effect that the cluster position of these substitutions has on luminescence quantum yields and excited-state lifetimes. |
| first_indexed | 2024-03-11T03:01:11Z |
| format | Article |
| id | doaj.art-ebee8e118eec451882acdc67a737935c |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T03:01:11Z |
| publishDate | 2023-06-01 |
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| series | Molecules |
| spelling | doaj.art-ebee8e118eec451882acdc67a737935c2023-11-18T08:17:33ZengMDPI AGMolecules1420-30492023-06-012811450510.3390/molecules28114505A Window into the Workings of <i>anti</i>-B<sub>18</sub>H<sub>22</sub> Luminescence—Blue-Fluorescent Isomeric Pair 3,3′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> and 3,4′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (and Others)Marcel Ehn0Dmytro Bavol1Jonathan Bould2Vojtěch Strnad3Miroslava Litecká4Kamil Lang5Kaplan Kirakci6William Clegg7Paul G. Waddell8Michael G. S. Londesborough9Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Řež, Czech RepublicInstitute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Řež, Czech RepublicInstitute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Řež, Czech RepublicInstitute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Řež, Czech RepublicInstitute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Řež, Czech RepublicInstitute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Řež, Czech RepublicInstitute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Řež, Czech RepublicChemistry, School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UKChemistry, School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UKInstitute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Řež, Czech RepublicThe action of AlCl<sub>3</sub> on room-temperature tetrachloromethane solutions of <i>anti</i>-B<sub>18</sub>H<sub>22</sub> (<b>1</b>) results in a mixture of fluorescent isomers, 3,3′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (<b>2</b>) and 3,4′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (<b>3</b>), together isolated in a 76% yield. Compounds <b>2</b> and <b>3</b> are capable of the stable emission of blue light under UV-excitation. In addition, small amounts of other dichlorinated isomers, 4,4′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (<b>4</b>), 3,1′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (<b>5</b>), and 7,3′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (<b>6</b>) were isolated, along with blue-fluorescent monochlorinated derivatives, 3-Cl-B<sub>18</sub>H<sub>21</sub> (<b>7</b>) and 4-Cl-B<sub>18</sub>H<sub>21</sub> (<b>8</b>), and trichlorinated species 3,4,3′-Cl<sub>3</sub>-B<sub>18</sub>H<sub>19</sub> (<b>9</b>) and 3,4,4′-Cl<sub>3</sub>-B<sub>18</sub>H<sub>19</sub> (<b>10</b>). The molecular structures of these new chlorinated derivatives of octadecaborane are delineated, and the photophysics of some of these species are discussed in the context of the influence that chlorination bears on the luminescence of <i>anti</i>-B<sub>18</sub>H<sub>22</sub>. In particular, this study produces important information on the effect that the cluster position of these substitutions has on luminescence quantum yields and excited-state lifetimes.https://www.mdpi.com/1420-3049/28/11/4505<i>anti</i>-B<sub>18</sub>H<sub>22</sub>luminescencefluorescencecluster boron hydrideschlorinationhalogenation |
| spellingShingle | Marcel Ehn Dmytro Bavol Jonathan Bould Vojtěch Strnad Miroslava Litecká Kamil Lang Kaplan Kirakci William Clegg Paul G. Waddell Michael G. S. Londesborough A Window into the Workings of <i>anti</i>-B<sub>18</sub>H<sub>22</sub> Luminescence—Blue-Fluorescent Isomeric Pair 3,3′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> and 3,4′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (and Others) Molecules <i>anti</i>-B<sub>18</sub>H<sub>22</sub> luminescence fluorescence cluster boron hydrides chlorination halogenation |
| title | A Window into the Workings of <i>anti</i>-B<sub>18</sub>H<sub>22</sub> Luminescence—Blue-Fluorescent Isomeric Pair 3,3′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> and 3,4′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (and Others) |
| title_full | A Window into the Workings of <i>anti</i>-B<sub>18</sub>H<sub>22</sub> Luminescence—Blue-Fluorescent Isomeric Pair 3,3′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> and 3,4′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (and Others) |
| title_fullStr | A Window into the Workings of <i>anti</i>-B<sub>18</sub>H<sub>22</sub> Luminescence—Blue-Fluorescent Isomeric Pair 3,3′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> and 3,4′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (and Others) |
| title_full_unstemmed | A Window into the Workings of <i>anti</i>-B<sub>18</sub>H<sub>22</sub> Luminescence—Blue-Fluorescent Isomeric Pair 3,3′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> and 3,4′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (and Others) |
| title_short | A Window into the Workings of <i>anti</i>-B<sub>18</sub>H<sub>22</sub> Luminescence—Blue-Fluorescent Isomeric Pair 3,3′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> and 3,4′-Cl<sub>2</sub>-B<sub>18</sub>H<sub>20</sub> (and Others) |
| title_sort | window into the workings of i anti i b sub 18 sub h sub 22 sub luminescence blue fluorescent isomeric pair 3 3 cl sub 2 sub b sub 18 sub h sub 20 sub and 3 4 cl sub 2 sub b sub 18 sub h sub 20 sub and others |
| topic | <i>anti</i>-B<sub>18</sub>H<sub>22</sub> luminescence fluorescence cluster boron hydrides chlorination halogenation |
| url | https://www.mdpi.com/1420-3049/28/11/4505 |
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