14,16-Bridged 16-crown-5 derivatives possess unusually high cation-binding abilities for most cations, maintaining the original relative cation-selectivity for Na+ and Ag+, for which the fixed conformation is responsible.
                                    14,16-桥连16元
环醚衍
生物对大多数阳离子具有异常高的离子结合能力,并保持对Na+和Ag+的原始相对选择性,这种选择性是由其固定构象所导致的。