Two porous, chiral metal-organic frameworks (MOFs), Ca(l-lactate)(acetate)(CHOH)(HO) (MOF-1201) and Ca(l-lactate)(acetate)(HO) (MOF-1203), are constructed from Ca ions and l-lactate [CHCH(OH)COO], where Ca ions are bridged by the carboxylate and hydroxyl groups of lactate and the carboxylate group of acetate to give a three-dimensional arrangement of Ca(-COO, -OH) polyhedra supporting one-dimensional pores with apertures and internal diameters of 7.8 and 9.6 Å (MOF-1201) and 4.6 and 5.6 Å (MOF-1203), respectively. These MOFs represent the first examples of extended porous structures based on Ca and lactate. They show permanent porosity of 430 and 160 m g, respectively, and can encapsulate an agriculturally important fumigant, cis-1,3-dichloropropene. MOF-1201 shows a 100 times lower release rate compared with liquid cis-1,3-dichloropropene under the same test conditions (25 °C, air flow rate of 1 cm min). The hydrolysis of MOF-1201 in water makes it the first example of a degradable porous solid carrier for such fumigants.
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