1) Researchers obtained a new solvated form of TPB (1,1,4,4-tetraphenyl-1,3-butadiene) containing ordered arrays of cyclohexane guest molecules within channels in the crystal structure. 2) The solvated form was very unstable and would lose the cyclohexane guests within minutes of removal from solution. This caused the structure to transform into the γ polymorph of pure TPB. 3) Interestingly, when exposed to cyclohexanone vapors, the structure did not decompose but instead exchanged the cyclohexane for cyclohexanone without losing crystallinity, demonstrating that the channels can stabilize guests.