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Synthesis and alkali metal picrate extraction capabilities of novel, cage-functionalized diazacrown ethers. Effects of host preorganization on avidity and selectivity toward alkali metal picrates in solution
Authors: Alan P. Marchand, Artie S. McKim, Kaipenchery A. Kumar
Tetrahedron V. 54, Issue 44, 1998, Pages 13421-13426

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http://dx.doi.org/10.1016/S0040-4020(98)00823-0

Synthesis and structures of isomerically pure bis-(alkylbenzo) crown ethers
Authors: Richard A. Sachleben, Jeffrey C. Bryan, Jerome M. Lavis, Courtney M. Starks, John H. Burns
Tetrahedron V.53, Issue 40, 1997, Pages 13567-13582

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http://dx.doi.org/10.1016/S0040-4020(97)00932-0

Extraction of alkali metal picrates with poly- and bis(crown ether)s
Authors: Keiichi Kimura, Takumi Maeda, Toshiyuki Shono
Talanta V. 26, Issue 10, 1979, Pages 945-949

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http://dx.doi.org/10.1016/0039-9140(79)80131-9

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