We have studied the magnetic-field-induced alignment of Crown ether-substituted Phthalocyanine molecules dissolved in chloroform. Varying the concentration and the temperature of the solution, the molecular clustering and medium-long-range ordering of molecules in solution have been studied. High magnetic fields, up to 20T, are used to induce a macroscopic degree of order, which is probed by ''in situ'' polarized optical spectra and magnetic-induced dichroism.