Two new molecular boxes, the mono‐bromo box [Au 6 (Triphos) 4 Br](SbF 6 ) 5 ⋅6(CH 2 Cl 2 ), 4 mB , and the dibromo box, [Au 6 (Triphos) 4 Br 2 ⋅H 2 O](SbF 6 ) 4 ⋅4(CH 2 Cl 2 ), 5 dB , have been prepared in crystalline form. Although constructed from non‐luminescent components, both are strongly luminescent. Like its chloro counterpart, the mono‐bromo box [Au 6 (Triphos) 4 Br](SbF 6 ) 5 ⋅6(CH 2 Cl 2 ), 4 mB , is mechanochromic. Under grinding, it loses its luminescence. The bromo‐bridged helicate, [(μ‐Br){Au 3 (Triphos) 2 } 2 ](CF 3 SO 3 ) 5 ⋅2(CH 2 Cl 2 ), 3μ‐H , with a cation that is isomeric with the box [Au 6 (Triphos) 4 Br] 5+ , has also been prepared and crystallographically characterized. Unlike its chloro analogue, [(μ‐Br){Au 3 (Triphos) 2 } 2 ](CF 3 SO 3 ) 5 ⋅2(CH 2 Cl 2 ) is not luminescent. Thus, the cation produced upon grinding may be the cation present in the bromo‐bridged helicate, [(μ‐Br){Au 3 (Triphos) 2 } 2 ](CF 3 SO 3 ) 5 ⋅2(CH 2 Cl 2 ), 3μ‐H . The dibromo box, [Au 6 (Triphos) 4 Br 2 ⋅H 2 O](SbF 6 ) 4 ⋅4(CH 2 Cl 2 ), 5 dB , is not significantly mechanochromic.
Walters, Daniel T., et al. "The Preparation of Luminescent, Mechanochromic Molecular Containers from Non‐Emissive Components: The Box Cations, [Au <sub>6</sub> (Triphos) <sub>4</sub> Br] <sup>5+</sup> and [Au <sub>6</sub> (Triphos) <sub>4</sub> Br <sub>2</sub> ] <sup>4+</sup>." Chemistry - A European Journal, vol. 25, no. 15, Feb. 2019. https://doi.org/10.1002/chem.201805247
Walters, Daniel T., Powers, Xian B., Olmstead, Marilyn M., & Balch, Alan L. (2019). The Preparation of Luminescent, Mechanochromic Molecular Containers from Non‐Emissive Components: The Box Cations, [Au <sub>6</sub> (Triphos) <sub>4</sub> Br] <sup>5+</sup> and [Au <sub>6</sub> (Triphos) <sub>4</sub> Br <sub>2</sub> ] <sup>4+</sup>. Chemistry - A European Journal, 25(15). https://doi.org/10.1002/chem.201805247
Walters, Daniel T., Powers, Xian B., Olmstead, Marilyn M., et al., "The Preparation of Luminescent, Mechanochromic Molecular Containers from Non‐Emissive Components: The Box Cations, [Au <sub>6</sub> (Triphos) <sub>4</sub> Br] <sup>5+</sup> and [Au <sub>6</sub> (Triphos) <sub>4</sub> Br <sub>2</sub> ] <sup>4+</sup>," Chemistry - A European Journal 25, no. 15 (2019), https://doi.org/10.1002/chem.201805247
@article{osti_1494208,
author = {Walters, Daniel T. and Powers, Xian B. and Olmstead, Marilyn M. and Balch, Alan L.},
title = {The Preparation of Luminescent, Mechanochromic Molecular Containers from Non‐Emissive Components: The Box Cations, [Au <sub>6</sub> (Triphos) <sub>4</sub> Br] <sup>5+</sup> and [Au <sub>6</sub> (Triphos) <sub>4</sub> Br <sub>2</sub> ] <sup>4+</sup>},
annote = {Abstract Two new molecular boxes, the mono‐bromo box [Au 6 (Triphos) 4 Br](SbF 6 ) 5 ⋅6(CH 2 Cl 2 ), 4 mB , and the dibromo box, [Au 6 (Triphos) 4 Br 2 ⋅H 2 O](SbF 6 ) 4 ⋅4(CH 2 Cl 2 ), 5 dB , have been prepared in crystalline form. Although constructed from non‐luminescent components, both are strongly luminescent. Like its chloro counterpart, the mono‐bromo box [Au 6 (Triphos) 4 Br](SbF 6 ) 5 ⋅6(CH 2 Cl 2 ), 4 mB , is mechanochromic. Under grinding, it loses its luminescence. The bromo‐bridged helicate, [(μ‐Br){Au 3 (Triphos) 2 } 2 ](CF 3 SO 3 ) 5 ⋅2(CH 2 Cl 2 ), 3μ‐H , with a cation that is isomeric with the box [Au 6 (Triphos) 4 Br] 5+ , has also been prepared and crystallographically characterized. Unlike its chloro analogue, [(μ‐Br){Au 3 (Triphos) 2 } 2 ](CF 3 SO 3 ) 5 ⋅2(CH 2 Cl 2 ) is not luminescent. Thus, the cation produced upon grinding may be the cation present in the bromo‐bridged helicate, [(μ‐Br){Au 3 (Triphos) 2 } 2 ](CF 3 SO 3 ) 5 ⋅2(CH 2 Cl 2 ), 3μ‐H . The dibromo box, [Au 6 (Triphos) 4 Br 2 ⋅H 2 O](SbF 6 ) 4 ⋅4(CH 2 Cl 2 ), 5 dB , is not significantly mechanochromic. },
doi = {10.1002/chem.201805247},
url = {https://www.osti.gov/biblio/1494208},
journal = {Chemistry - A European Journal},
issn = {ISSN 0947-6539},
number = {15},
volume = {25},
place = {Germany},
publisher = {Wiley Blackwell (John Wiley & Sons)},
year = {2019},
month = {02}}