Figure 4

SEM images of metal carboxylic acids CPs micro/nanostructures obtained at ambient conditions, including: Co-BTC CPs, using (a1) EtOH, (a2) THF, (a3) DMF, (a4) MeCN, (a5) DMSO; Zn-pydc, (b1) EtOH, (b2) THF, (b3) DMF, (b4) MeCN, (b5) DMSO; Eu-pydc, (c1) EtOH, (c2) THF, (c3) DMF, (c4) MeCN, (c5) DMSO.