Solution-mediated and single-crystal to single-crystal transformations of cucurbit[6]uril host–guest complexes with dopamine,CrystEngComm

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Solution-mediated and single-crystal to single-crystal transformations of cucurbit[6]uril host–guest complexes with dopamine
CrystEngComm ( IF 2.6 ) Pub Date : 2019/12/20 , DOI: 10.1039/c9ce01743g
Oksana Danylyuk _{1,

2,

3,

4} , Marta Worzakowska _{5,

6,

7,

8,

9} , Joanna Osypiuk-Tomasik _{4,

7,

8,

10} , Volodymyr Sashuk _{1,

2,

3,

4} , Karolina Kedra-Krolik _{1,

2,

3,

4}

Affiliation

Host–guest complexation between cucurbit[6]uril and dopamine results in concomitant crystallization of two morphologically distinct supramolecular isomers. Form I appears as prismatic crystals and crystallizes in the P2₁2₁2₁ space group. Form II appears as needles and crystallizes in the R [3 with combining macron]

space group. Form I is unstable in solution and spontaneously converts into form II. Additionally, form II undergoes single-crystal to single-crystal dehydration at room temperature mediated by an alteration of the host–guest hydrogen bonding pattern and collective reorganization of dopamine guest molecules.

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