d="p0005">New class of nonlinear-optical chromophores, containing phenylindolizine donors, is proposed.
dd><dt class="label">•dt><dd>d="p0010">Donors attached at position 3 to the π-bridge have higher values of first hyperpolarizability.
dd><dt class="label">•dt><dd>d="p0015">The indolizine donors are preferable than dimethylaniline ones concerning β values.
dd>dl>